Space not adjusted for this kind of fuel (8)
I believe the answer is:
opencast
'this kind of fuel' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?
'space not adjusted' is the wordplay.
'adjusted' indicates anagramming the letters.
'space'+'not'='spacenot'
'spacenot' is an anagram of 'OPENCAST'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for opencast that I've seen before include "sort of mine" , "mining - with 6d" , "Sort of mining" , "Method of mining" , "Surface type of mining" .)