Crossword Genius

Cryptically, this suggests control out of action? (4,2)

Ross

I believe the answer is:

laid up

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'out of action?' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

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(Other definitions for laid up that I've seen before include "(Of ship) put in dock" , "Stored, preserved" , "in sickbed" , "Injured" , "Dicky" .)

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