Crossword Genius

Fuel from well in ground (5,3)

Ross

I believe the answer is:

shale oil

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

'well in ground' is the wordplay.
'well' becomes 'hale' (I've seen this in another clue).
'in' indicates putting letters inside.
'ground' becomes 'soil' (soil is a kind of ground).
'hale' going into 'soil' is 'SHALE-OIL'.

'from' is the link.

(Another definition for shale oil that I've seen is " Fuel".)

I've seen this clue in The Guardian.
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