Rolling old coin over opening (7)
I believe the answer is:
solvent
'rolling' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?
'old coin over opening' is the wordplay.
'old coin' becomes 'sol' (I've seen this before).
'over opening' becomes 'vent' (a vent is an opening or outlet. I am not sure about the 'over' bit.).
'sol'+'vent'='SOLVENT'
Can you help me to learn more?
(Other definitions for solvent that I've seen before include "Not in debt" , "Financially viable" , "Having enough money to meet obligations" , "Financially sound" , "of tradable status?" .)