An ex-colleague of DJ Neil Fox was made redundant after complaining about his "sleazy" behaviour, Westminster Magistrates Court has heard.
The woman, who cannot be named for legal reasons, said the DJ tickled her and put his hand up her top while a record was playing in the studio.
"I asked him to get off me but he found it funny," she claimed.
Mr Fox, 54, from south-west London, denies eight indecent assaults and two sexual assaults between 1988 and 2014.
In a police statement made last year, he said he had never had "a problem with girls", he was in a loving marriage and had never hugged a woman to "have a sneaky feel", the court heard.
"I've not committed any of these crimes," he told the police.
"In radio, there is lots of fun, lots of high jinks, lots of horseplay, lots of banter. But I know where the line is, and I have not crossed the line."
His female colleague said she had been reluctant to make a complaint because Mr Fox was the "money maker" at Magic radio station and his was the "number one breakfast show in London" at the time.
"I felt uncomfortable and found Neil sleazy," she said.
She eventually reported him and also accused him of making a racist comment, the trial heard.
The court heard the woman was offered a new job with a drop in pay, which she declined, and was then offered redundancy, which she accepted.
'Sexual' banter
During the alleged 45-second assault, Mr Fox got off his chair and began tickling her, the court heard.
"I was wearing an off-the-shoulder top. He put his hand up my top to my waist and was tickling."
She said Mr Fox manoeuvred her on to the sofa and began "simulating thrusting" over her, while a male colleague took pictures on his phone.
She said she told Mr Fox to get off three times before he eventually did.
Defence counsel Jonathan Caplan QC said Mr Fox did not have "a specific recollection" of the alleged assault.
Asked if the comments could be considered part of sexual "banter" that she also participated in from time to time, the woman said: "Yeah, OK."
'Not like that'
Mr Fox is also accused of fondling a colleague's breasts while hugging her from behind at Capital FM radio station, where he worked until 2005.
In a police interview on the day of his arrest last year, Mr Fox denied the incident, saying he was "extremely happy and in love" with his wife.
He said: "It (hugging) is never a sexual thing or anything weird like that. It's all very matey.
"I could have easily hugged [the complainant] at some point. It may have been a brilliant show, or a good interview, or 'happy Christmas' or 'happy birthday'", he said, in the interview that was read out in court.
"But I don't hug trying to have a sneaky feel. I'm not like that."
Bare shoulder
He also denied accusations that he bullied or intimidated women.
"I've never had a problem with girls or girls doing well or girls getting on - quite the opposite, actually," he said, in his statement.
"To say I was intimidating [a complainant] ... I find that quite sad because it is not in my nature."
Mr Fox said he had no recollection of another incident in which he is alleged to have kissed a colleague's bare shoulder from behind in a communal kitchen.
"I could have touched her back, it's a tiny kitchen. But I can't imagine kissing [the complainant] on the shoulder."
'Crazy fans'
In another statement given to police last year, Mr Fox said details of allegations that he forced his tongue into the mouth of a 15-year-old girl at a Capital Radio roadshow in 1996 were "incredulous".
He said he might have given fans a peck on the cheek "if they asked for it - but not on the lips".
"Maybe it was them [fans] kissing us. We all used to see it - they used to get quite crazy," he added.
Mr Fox, who uses the nicknames Dr Fox and Foxy, became well known for presenting the chart show on Capital Radio, and was a judge on the ITV show Pop Idol between 2001 and 2003 alongside Simon Cowell.
He joined Magic 105.4 in 2005, where he presents the breakfast show, Foxy in the Morning. He is currently not hosting the show.
The trial continues.