Tuesday, June 30, 1998 Published at 17:02 GMT 18:02 UK
Lewinsky tape-maker testifies
Linda Tripp (centre) leaving the courthouse
After six hours of questioning, Ms Tripp left the US District Court House without making any comment.
Ms Tripp's secretly-made tape recordings of a conversation in which Miss Lewinsky talked about sexual contacts she said she had with Mr Clinton form the basis of the current investigation that the President had sexual relations with Miss Lewinsky and then lied about it under oath.
Mr Clinton has denied having a sexual relationship with Miss Lewinsky.
A BBC correspondent in Washington says Mr Starr is also apparently trying to increase pressure on Miss Lewinsky herself to co-operate with him or face possible indictment for perjury.
Ms Tripp's testimony is being given in private to the grand jury examining the evidence against Mr Clinton. She is expected to give evidence again on Thursday.
Her testimony sparked a delicate debate in America about the definition of sexual relations.
Ms Young has said that President Clinton set limits and that, "nothing ever came to completion".
Meanwhile a judge has ruled that information submitted in a failed sexual harassment case brought against Mr Clinton by Paula Jones should be made public. The material includes a full transcript of President Clinton's deposition. The ruling had been sought by media groups.