The Parisian certainly quiet, being back in study (7)
I believe the answer is:
perusal
'study' is the definition.
(thesaurus)
'the parisian certainly quiet being back' is the wordplay.
'the parisian' becomes 'la' (French for the).
'certainly' becomes 'sure' ('sure' can be a synonym of 'certainly'**).
'quiet' becomes 'p' (music symbol for 'piano').
'being back' is a reversal indicator.
'la'+'sure'+'p'='lasurep'
'lasurep' in reverse letter order is 'PERUSAL'.
'in' acts as a link.
(Other definitions for perusal that I've seen before include "A casual read or study" , "Study or scrutiny" , "Thorough reading" , "worth a close look" , "Reading, examination" .)