Fan left deliveries at Old Trafford (5)
I believe the answer is:
lover
'fan' is the definition.
(I've seen this before)
'left deliveries at old trafford' is the wordplay.
'left' becomes 'l' (common abbreviation).
'deliveries at old trafford' becomes 'over' (cricket term - Old Trafford is a cricket ground).
'l'+'over'='LOVER'
(Other definitions for lover that I've seen before include "One of a couple" , "finished litre first" , "Paramour" , "toy boy" , "Juliet, for example" .)