Team dies out (4)
I believe the answer is:
side
'team' is the definition.
(both can mean a sports team)
'dies out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'dies' anagrammed gives 'SIDE'.
(Other definitions for side that I've seen before include "[MAN U], perhaps" , "Sporting team" , "pretentious attitude" , "Football team" , "A quarter, or half" .)