Crossword Genius

Fellow to turn to the Spanish petrol (4)

Ross

I believe the answer is:

fuel

I'm a little stuck... Click here to teach me more about this clue!

'petrol' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'fellow to turn to the spanish' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'to turn' becomes 'U' (a 'U-turn' is a kind of turn).
'to the spanish' becomes 'el' ('the' in Spanish).
'f'+'u'+'el'='FUEL'

Can you help me to learn more?

(Other definitions for fuel that I've seen before include "Eg, coal or oil" , "coal etc" , "Power source; inflame" , "Material for burning" , "Eg, coal or petrol" .)

I've seen this clue in The Mirror.
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