Reserve cash one kept in the fridge (3,5)
I believe the answer is:
ice lolly
'one kept in the fridge' is the definition.
I can't tell whether this definition defines the answer.
'reserve cash' is the wordplay.
'reserve' becomes 'ice ' (both can mean aloofness).
'cash' becomes 'lolly' (I've seen this before).
'ice'+'lolly'='ICE-LOLLY'
Can you help me to learn more?
(Other definitions for ice lolly that I've seen before include "Frozen treat" , "It's frozen on a small wooden stick" , "What young sucker preferred" , "summer treat" , "'Frozen sweet on a stick (3,5)'" .)