More than off-color (4)
I believe the answer is:
lewd
'more than off-color' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lewd that I've seen before include "Sexually crude" , "Obscene - lustful - sensual" , "Bawdy" , "Smutty" , "Crude, offensive" .)