Crossword Genius

Lubricant from boiler (3)

Ross

I believe the answer is:

oil

'lubricant' is the definition.
(I've seen this before)

'from boiler' is the wordplay.
'from' indicates a hidden word.
'OIL' is hidden in the letters of 'boiler'.

(Other definitions for oil that I've seen before include "Fuel, lubricant" , "valuable commodity" , "Fossil fuel" , "Greasy liquid" , "Valuable viscous liquid" .)

I've seen this clue in The Mirror.
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