Well, that just leaves Mr. Boddy.
5 seconds sound clip from the Clue (1985) movie soundboard.
You can hear this line at 00:23:51.922 in the Blu-ray version of the movie.
Quote context
[...]
- But he was your second husband. Your first husband also disappeared.
- But that was his job. He was an illusionist.
- He wasn't a very good illusionist.
- I'm not gonna wait for Wadsworth here to unmask me.
- I work for the State Department, and I'm a homosexual.
- Well, that just leaves Mr. Boddy.
- His secret? Haven't you guessed? He's the one who's blackmailing you.
- You bastard! Come on! Put 'em up!
- If you can't fight fairly, don't fight at all.
- Was that necessary, Mrs. White?
[...]