The most common and most likely answer to this crossword clue is the 8 letter word GRATEFUL
I've seen this crossword clue in The Guardian
G
R
A
T
E
F
U
L
More clues leading to the result GRATEFUL
- Appreciative, having this much coal?
- Pleased most of fireplace has variety of fuel
- Appreciative, given mince and almost bursting
- Obliged to pull back, when about to consider force
- Appreciative of a rug left around
- Satisfied with a quantity of fuel
- Under obligation, dropping rate fully? Only partially
- Pleased grid’s well-nigh complete
- Appreciative for quantity of coal
- Beholden to have mixture of gruel and fat
Buddy explains!

The straight part
We know that "Appreciative" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case appreciative = grateful.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GRATEFUL mean?
GRATEFUL adjective- Appreciative; thankful.
- Pleasing, welcome.