Crossword Genius

Of fire (7)

Ross

I believe the answer is:

igneous

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

This is the entire clue.

(Other definitions for igneous that I've seen before include "(Rock) set from lava" , "(Of rock) originating in molten state" , "Like fire - type of rock" , "Of fire, fiery" , "Of rocks, volcanic" .)

I've seen this clue in the Sydney Morning Herald and The Times.
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