Check quiet dress (5)
I believe the answer is:
probe
'check' is the definition.
(thesaurus)
'quiet dress' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano').
'dress' becomes 'robe' (robing is a kind of dressing).
'p'+'robe'='PROBE'
(Other definitions for probe that I've seen before include "Question or examine thoroughly" , "Examine searchingly" , "Closely enquire into" , "Inquiry" , "Poke into" .)