Obliged, appreciative (8)
I believe the answer is:
grateful
This clue is a double definition.
'obliged' is the first definition.
(I've seen this in another clue)
'appreciative' is the second definition.
(similar in meaning)
(Other definitions for grateful that I've seen before include "Showing gratitude" , "Felt a rug (anag)" , "Beholden" , "Thankful, appreciative" , "quantity of coal" .)