Fine new gear for the troop leader (5)
I believe the answer is:
great
'fine' is the definition.
(thesaurus)
'new gear for the troop leader' is the wordplay.
'new' is an anagram indicator.
'for' is a charade indicator (letters next to each other).
'leader' suggests taking the first letters.
The initial letter of 'troop' is 't'.
'gear' is an anagram of 'grea'.
'grea'+'t'='GREAT'
(Other definitions for great that I've seen before include "Huge or outstanding" , "Waterbird" , "Terrific" , "Wonderful" , "Considerably above average" .)