Squad dies out (4)
I believe the answer is:
side
'squad' is the definition.
(thesaurus)
'dies out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'dies' is an anagram of 'SIDE'.
(Other definitions for side that I've seen before include "Aspect, sports team" , "superciliousness" , "Football team" , "Edge - aspect - team" , "part" .)