Pleased most of fireplace has variety of fuel (8)
I believe the answer is:
grateful
'pleased' is the definition.
(thesaurus)
'most of fireplace has variety of fuel' is the wordplay.
'most of' means to remove the last letter.
'fireplace' becomes 'grate' (I've seen this before).
'has' is a charade indicator (letters next to each other).
'variety of' indicates an anagram.
'grate' with its final letter taken off is 'grat'.
'fuel' with letters rearranged gives 'eful'.
'grat'+'eful'='GRATEFUL'
(Other definitions for grateful that I've seen before include "Thankful, appreciative" , "Showing appreciation for kindness" , "Beholden" , "Showing gratitude" , "quantity of coal" .)