Away side at Old Trafford (3)
I believe the answer is:
off
I believe this is a double definition.
'away' is the first definition.
('off' can be a synonym of 'away')
'side at old trafford' is the second definition.
(side in a cricket ground eg Old Trafford)
(Other definitions for off that I've seen before include "On holiday" , "Unsatisfactory" , "Rotten" , "Complete (6,3) - See 14" , "start to race" .)