Relish old money changing hands (5)
I believe the answer is:
gloat
'relish' is the definition.
The answer and definition can be both feelings as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'old money changing hands' is the wordplay.
I cannot quite see how this works, but
'old' could be 'o' (common abbreviation eg in OE for Old English) and 'o' is found in the answer.
'money' could be 'l' (L can mean 'pounds') and 'l' is present in the answer.
The remaining letters 'gat' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
(Other definitions for gloat that I've seen before include "Show malicious smugness" , "Be smug about one's success" , "Take malicious satisfaction" , "Dwell on with self-satisfaction" , "Be full of malicious delight" .)