Immobilise player as ordered (8)
I believe the answer is:
paralyse
'immobilise' is the definition.
(paralysing is a kind of immobilizing)
'player as ordered' is the wordplay.
'ordered' is an anagram indicator.
'player'+'as'='playeras'
'playeras' anagrammed gives 'PARALYSE'.
(Other definitions for paralyse that I've seen before include "Make powerless, immobile, unable to function" , "Bring to a standstill" , "Cripple, incapacitate" , "Immobilise a person" , "make still" .)