Sweet provision, as if never used (4,9)
I believe the answer is:
mint condition
'sweet provision' is the definition.
The definition suggests a singular noun which matches the answer.
'if never used' is the wordplay.
I cannot really understand how this works, but
'if' could be 'condition' (eg a 'big if' is a condition) and 'condition' is found in the answer.
'never used' could be 'mint' (I've seen this in another clue) and 'mint' is found in the answer.
No letters remain.
This explanation may well be incorrect...
'as' is the link.
Can you help me to learn more?
(Other definitions for mint condition that I've seen before include "Unused, pristine state" , "(Of coin) original quality" , "Perfect unused state" , "State of new coins" .)