Foul a sub on the move? Great (8)
I believe the answer is:
fabulous
'great' is the definition.
(I've seen this before)
'foul a sub on the move?' is the wordplay.
'on the move?' indicates an anagram (I've seen 'on the move' mean this).
'foul'+'a'+'sub'='foulasub'
'foulasub' with letters rearranged gives 'FABULOUS'.
(Other definitions for fabulous that I've seen before include "Marvellous, incredibly great" , "almost incredible" , "Legendary - amazing" , "Legendary or informally marvellous" , "Smashing" .)