Crossword Genius

Manoeuvre layers of rock and stone (9)

Ross

I believe the answer is:

stratagem

'manoeuvre' is the definition.
(stratagem is a kind of manoeuvre)

'layers of rock and stone' is the wordplay.
'layers of rock' becomes 'strata' (I've seen this in other clues).
'and' says to put letters next to each other.
'stone' becomes 'gem' (I've seen this before).
'strata'+'gem'='STRATAGEM'

(Other definitions for stratagem that I've seen before include "Clever scheme" , "Plan to deceive enemy" , "Tag master with cunning plan" , "Devious ploy" , "Ploy - start game (anag)" .)

I've seen this clue in The Telegraph.
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