The Parisian with a new list (4)
I believe the answer is:
lean
'list' is the definition.
(thesaurus)
'the parisian with a new' is the wordplay.
'the parisian' becomes 'le' (definite article in French).
'with' says to put letters next to each other.
'a new' becomes 'an' (I've seen this in other clues).
'le'+'an'='LEAN'
(Other definitions for lean that I've seen before include "skinny" , "Spare - list" , "Tend towards being thin" , "Insufficient - incline" , "Spare - incline" .)