Bad boy attendant outside with plunder (7)
I believe the answer is:
pillage
'plunder' is the definition.
(I know that plunder can be written as pillage)
'bad boy attendant outside' is the wordplay.
'bad' becomes 'i'll' (associated in meaning).
'boy attendant' becomes 'page' (page can mean a boy servant).
'outside' is an insertion indicator.
'ill' put into 'page' is 'PILLAGE'.
'with' acts as a link.
(Other definitions for pillage that I've seen before include "Loot" , "Plunder, sack" , "Sacking" , "Rob with violence" , "Violent stealing" .)