Cake show award (7,5)
I believe the answer is:
brownie point
'award' is the definition.
'cake show' is the wordplay.
'cake' becomes 'brownie' (brownie is a kind of cake).
'show' becomes 'point' ('point' can be a synonym of 'show').
'brownie'+'point'='BROWNIE POINT'
(Other definitions for brownie point that I've seen before include "mark of approval" , "commendation" , "gains nominal mark" , "Mark for good behaviour" , "Credit for a good deed" .)