Dress in a quiet pearl ensemble (7)
I believe the answer is:
apparel
'dress' is the definition.
(synonyms)
'a quiet pearl ensemble' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano', ie soft or quiet).
'ensemble' indicates an anagram.
'pearl' with letters rearranged gives 'parel'.
'a'+'p'+'parel'='APPAREL'
'in' is the link.
(Other definitions for apparel that I've seen before include "what's in the press?" , "Garb, clothes" , "Pod of peas" , "Clothing, things to wear" , "Real pap (anag) - clothing" .)