Fawn belt covering zip with difficulty (3,3,6)
I believe the answer is:
bow and scrape
'fawn' is the definition.
(both can mean to act obsequiously)
'belt covering zip with difficulty' is the wordplay.
'belt' becomes 'band' (belt can mean a band of material).
'covering' is an insertion indicator.
'zip' becomes 'o' (zip can mean zero).
'with' becomes 'w' (abbreviation).
'difficulty' becomes 'scrape' (I've seen this in another clue).
'o'+'w'='ow'
'band' placed around 'ow' is 'bowand'.
'bowand'+'scrape'='BOW AND SCRAPE'
(Other definitions for bow and scrape that I've seen before include "Behave obsequiously" , "Grovel" , "Be obsequious" , "show subservience" , "Show humility" .)