They are not obliged to reduce local golf charges (8)
I believe the answer is:
ingrates
'they are not obliged' is the definition.
The definition suggests an adverb but the answer is not.
'reduce local golf charges' is the wordplay.
'reduce' means to remove the last letter (I've seen 'reduced' mean this).
'local' becomes 'inn' (local can mean someone's local pub).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'charges' becomes 'rates' (rate is a kind of charge).
'inn' with its final letter taken off is 'in'.
'in'+'g'+'rates'='INGRATES'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for ingrates that I've seen before include "Those showing no appreciation" , "They never say thanks" , "Thankless wretches" , "unappreciative people" , "They express no thanks" .)