Brum team at home? One performing may get booed (7)
I believe the answer is:
villain
'one performing may get booed' is the definition.
'brum team at home?' is the wordplay.
'brum team' becomes 'villa' (Aston Villa).
'at home?' becomes 'in' ('in' can be similar in meaning to 'at home').
'villa'+'in'='VILLAIN'
(Other definitions for villain that I've seen before include "Wicked criminal" , "Criminal; stage baddy" , "Principal wicked character" , "One played badly" , "Bad person in story/play" .)