Business competitor in Perivale? (5)
I believe the answer is:
rival
'business competitor' is the definition.
(I've seen this in another clue)
'in perivale?' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RIVAL' is hidden within 'perivale'.
(Other definitions for rival that I've seen before include "Be equal to in quality" , "Adversary or foe" , "Competing opponent" , "Someone you hope to defeat" , "Person in direct competition" .)