Maybe lets us fight (6)
I believe the answer is:
tussle
'fight' is the definition.
(tussle is a kind of fight)
'maybe lets us' is the wordplay.
'maybe' is an anagram indicator.
'lets'+'us'='letsus'
'letsus' is an anagram of 'TUSSLE'.
(Other definitions for tussle that I've seen before include "Fight vigorously" , "Skirmish" , "Verbal or physical struggle or fight" , "Wrestle, scuffle" , "Struggle or wrestling match" .)