The woman, who is one of seven alleged victims of indecent assault by Mr Clifford, told London's Southwark Crown Court she was about 20 when he suggested he became her agent after she landed a role in Octopussy in the early 1980s.
The witness said she was "very frightened" and "screamed" at Mr Clifford to leave her alone after he "lunged" at her in his Bond Street office.
The woman, 52, said Mr Clifford told her he would make her famous and could get her a part in the new Charles Bronson film but needed some photographs of her in lingerie first.
She said that after posing for pictures she got dressed, and Mr Clifford "then lunged towards me and tried to kiss me".
She said: "I got very frightened and I kicked him between the legs really hard.
Asked by Richard Horwell QC, defending, if she was making her claims up, the witness said: "What I'm saying is, to my best knowledge, the absolute truth and anything that deviates from that as such - it's such a long time ago. And it did happen."
Mr Clifford, from Hersham in Surrey, is accused of 11 counts of indecent assault. He denies all the charges.
The trial continues.