Crossword Genius

Rotary engine (7)

Ross

I believe the answer is:

turbine

'rotary engine' is the definition.
(turbine is a kind of rotary engine)

This is all the clue.

(Other definitions for turbine that I've seen before include "Machine or motor for tribune" , "Source of power" , "Ruin bet (anag)" , "Power-generating machine" , "Machine generating power" .)

I've seen this clue in The Guardian and The Telegraph.
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