New field first making list (4)
I believe the answer is:
lean
'list' is the definition.
(thesaurus)
'new field first' is the wordplay.
'new' becomes 'n'.
'field' becomes 'lea' (I've seen this before**).
'first' says to put letters next to each other.
'n' after 'lea' is 'LEAN'.
'making' acts as a link.
(Other definitions for lean that I've seen before include "Wiry" , "What Jack Sprat's wife couldn't eat" , "Slim; veer" , "English film director" , "Incline to prop against" .)