Overtime pay for a barman, potentially? (9)
I believe the answer is:
refresher
'overtime pay' is the definition.
The definition and answer can be both related to property as well as being singular nouns.
Maybe there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for refresher that I've seen before include "course of sorts" , "Type of course" , "This reinvigorates" , "drink" , "Top-up course" .)