Hate letting money become offensive (9)
I believe the answer is:
abhorrent
'offensive' is the definition.
(similar in meaning)
'hate letting money' is the wordplay.
I cannot quite understand how this works, but
'hate' could be 'abhor' (abhorring is a kind of hating) and 'abhor' is present in the answer.
'money' could be 'rent' (money paid to rent a residence) and 'rent' is found within the answer.
No letters remain.
This explanation may well be incorrect...
'become' is the link.
Can you help me to learn more?
(Other definitions for abhorrent that I've seen before include "Detestable, loathsome" , "Hated" , "Inspiring disgust and loathing" , "Disgusting, loathsome" , "noisome" .)