Impale good man, a bishop (4)

I believe the answer is:

stab

'impale' is the definition.
(I've seen this before)

'good man a bishop' is the wordplay.
'good man' becomes 'st' (abbreviation for saint).
'bishop' becomes 'B' (chess abbreviation).
'st'+'a'+'b'='STAB'

(Other definitions for stab that I've seen before include "It could be the death of you" , "Injure with knife" , "Pierce with something pointed" , "Attempt (with dagger?)" , "Wound with a dagger" .)

I've seen this clue in The Sun.

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