Crossword Genius

Type of fuel (6)

Ross

I believe the answer is:

diesel

'type of fuel' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for diesel that I've seen before include "Vehicle fuel" , "Derv" , "Rudolf __ , French-born German engine inventor, d.1913" , "Liquid fuel" , "Common fuel for heavy vehicles" .)

I've seen this clue in the Family Time, The Mirror, The Sun, The Times and The Guardian.
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