Part of Macbeth usually like that (4)
I believe the answer is:
thus
'like that' is the definition.
(as in 'like so')
'part of macbeth usually' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'THUS' is hidden within 'macbeth usually'.
(Other definitions for thus that I've seen before include "Shut (anag.)" , "Consequently" , "an original Christmas gift" , "Therefore, hence" , "In this manner" .)