Scandalous fake fuel war (8)
I believe the answer is:
shameful
'scandalous' is the definition.
(I know that scandalous can be written as shameful)
'fake fuel war' is the wordplay.
'fake' becomes 'sham' (sham can mean fake or pretend).
'war' is an anagram indicator (I've seen 'warring' mean this).
'fuel' anagrammed gives 'eful'.
'sham'+'eful'='SHAMEFUL'
(Other definitions for shameful that I've seen before include "scandalous!" , "Dishonourable" , "Reprehensible" , "Ignoble, shocking" , "Ignominious" .)