Top Town Centre award (6)
I believe the answer is:
bestow
'award' is the definition.
(bestowing is a kind of awarding)
'top town centre' is the wordplay.
'top' becomes 'best' (similar in meaning).
'town centre' becomes 'ow' (central letters of the word 'town').
'best'+'ow'='BESTOW'
(Other definitions for bestow that I've seen before include "Confer or award" , "Set bow to give" , "Confer (an honour)" , "Award, present as a gift" , "Give as a gift" .)