Disrespect a fine face (7)
I believe the answer is:
affront
'disrespect' is the definition.
(to affront is to offend or disrespect)
'a fine face' is the wordplay.
'a fine' becomes 'af' (I've seen this in other clues).
'face' becomes 'front' (front is a kind of face).
'af'+'front'='AFFRONT'
(Other definitions for affront that I've seen before include "Deliberate insult or show of disrespect" , "Action causing outrage or offence" , "Insult, offend" , "Rant off over insult" , "Slap in the face" .)