Receiver's glass collection (7,3)
I believe the answer is:
crystal set
'receiver's' is the definition.
(I've seen this before)
'glass collection' is the wordplay.
'glass' becomes 'crystal' (crystal is a kind of glass).
'collection' becomes 'set' (set is a kind of collection).
'crystal'+'set'='CRYSTAL SET'
(Other definitions for crystal set that I've seen before include "Radio" , "used to receive long ago" , "Matching glasses" , "matching items of glassware?" , "Receiver" .)