Crossword Genius

Huge diminution in fuel (8)

Ross

I believe the answer is:

colossal

'huge' is the definition.
('colossal' can be a synonym of 'huge')

'diminution in fuel' is the wordplay.
'diminution' becomes 'loss' (loss is a kind of diminution).
'in' indicates putting letters inside.
'fuel' becomes 'coal' (coal is a kind of fuel).
'loss' inserted into 'coal' is 'COLOSSAL'.

(Other definitions for colossal that I've seen before include "Huge, vast" , "So locals may be huge" , "Mammoth" , "Very big" , "Massive" .)

I've seen this clue in The Telegraph.
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