Very good, very generous, but not firm (5)
I believe the answer is:
pious
'very good' is the definition.
(pious can mean very religious)
'generous but not firm' is the wordplay.
I cannot really see how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found within the answer.
The remaining letters 'pius' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'very' acts as a link.
Can you help me to learn more?
(Other definitions for pious that I've seen before include "Godly" , "Holier-than-thou" , "Dutiful" , "God-fearing" , "Self-righteous" .)