Mother's store for recycling plastic? (7)
I believe the answer is:
maestro
'plastic?' is the definition.
(type of credit card or 'plastic')
'mother's store for recycling' is the wordplay.
'mother' becomes 'ma' (ma is a kind of mother).
'for recycling' indicates anagramming the letters.
'store' with letters rearranged gives 'estro'.
'ma'+'estro'='MAESTRO'
(Other definitions for maestro that I've seen before include "great musician" , "Artist of consummate skill: conductor" , "An artist of consummate skill, master" , "hotshot" , "Famous conductor" .)