Crossword Genius

Miner tried to keep motionless (5)

Ross

I believe the answer is:

inert

'motionless' is the definition.
(thesaurus)

'miner tried to keep' is the wordplay.
'to keep' indicates a hidden word.
'INERT' can be found hidden inside 'miner tried'.

(Other definitions for inert that I've seen before include "Lacking vigour, inactive" , "Not chemically reactive" , "Disinclined to move" , "Indolent - unreactive" , "Unmoving" .)

I've seen this clue in The Mirror.
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