Crossword Genius

Jeans brand since 1978 (6)

Ross

I believe the answer is:

diesel

'jeans brand since 1978' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for diesel that I've seen before include "Engine fuel" , "Train perhaps" , "Motor fuel" , "See lid, oddly, of the fuel" , "Lorry fuel" .)

I've seen this clue in The Wall Street Journal.
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