Some miner totally motionless (5)

I believe the answer is:

inert

'motionless' is the definition.
(inertia is a lack of movement)

'some miner totally' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'INERT' can be found hidden inside 'miner totally'.

(Other definitions for inert that I've seen before include "Sluggish, still" , "Devoid of motion or change" , "like neon" , "(Chem.) not reactive" , "Chemically inactive" .)

I've seen this clue in The Daily Express.

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