I limit a wandering group of fighters (7)
I believe the answer is:
militia
'group of fighters' is the definition.
'militia' can be an answer for 'group' (I have seen 'Armed group ' mean 'militia' so perhaps 'group' could also mean 'militia'). I'm not certain of the 'of fighters' bit.
'i limit a wandering' is the wordplay.
'wandering' indicates anagramming the letters.
'i'+'limit'+'a'='ilimita'
'ilimita' with letters rearranged gives 'MILITIA'.
Can you help me to learn more?
(Other definitions for militia that I've seen before include "Force raised for emergency" , "Territorial force" , "Citizen soldiery" , "Military force of trained civilians" , "Troops" .)