Attractive but not loud, creating an impression (7)
I believe the answer is:
etching
'an impression' is the definition.
(I've seen this before)
'attractive but not loud' is the wordplay.
'attractive' becomes 'fetching' (similar in meaning).
'but not' is a deletion indicator.
'loud' becomes 'f' (short for forte - 'loud' in music).
'fetching' with 'f' taken out is 'ETCHING'.
'creating' acts as a link.
(Other definitions for etching that I've seen before include "Drawing on metal with acid" , "Deep print" , "making an impression" , "Eating away; corroding" , "Engraving with acid" .)