Rough sketch showing debauchery? On the contrary (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

“On the contrary” tells us to reverse the meaning of the wordplay, so [d] EBAUCHE [ry] is “showing” EBAUCHE rather than the other way round. Not a word I’ve seen before: ébauche (from French) = an initial rough sketch. Perhaps the sort of word that setters need to fill an awkward corner of the grid . . .