Starr disclosed he’d be representing private clients when he took the job. But critics note that his predecessor, Robert Fiske, severed ties to his law firm and devoted full time to Whitewater. Starr aides say he’s spending about four days a week on the probe. He’s “knocking himself out” commuting between Little Rock and Washington to work on the case, one says. But White House officials are troubled that Starr’s outside activities may delay the investigation, which has already saddled the Clintons with more than $1 million in legal fees, well into the ‘96 election year. “We have every right to expect Mr. Starr’s corporate-law practice will not interfere with the speed of the independent counsel’s work,” says a source close to Clinton.