Contrary bishop about to punch drug king (7)
I believe the answer is:
macbeth
'king' is the definition.
(I have seen 'Shakespearean king ' mean 'macbeth' so perhaps 'king' could also mean 'macbeth')
'contrary bishop about to punch drug' is the wordplay.
I cannot quite see how this works, but
'bishop' could be 'b' (chess abbreviation) and 'b' is present in the answer.
'about' could be 'c' (abbreviation for circa) and 'c' is present in the answer.
'drug' could be 'h' (H is an example) and 'h' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for macbeth that I've seen before include "He doth murder sleep (Shak.)" , "Thane of 6" , "Shakespeare's Scottish play, considered unlucky" , "bloody drama" , "Scottish ruler" .)