Cultural elements of Macbeth nicely encapsulated (6)
I believe the answer is:
ethnic
'cultural' is the definition.
(synonyms)
'elements of macbeth nicely encapsulated' is the wordplay.
'elements of' indicates a hidden word (elements or parts of the clue).
'ETHNIC' can be found hidden inside 'macbeth nicely encapsulated'.
(Other definitions for ethnic that I've seen before include "Having a common race or cultural tradition" , "Relating to race or culture" , "To do with racial group or culture" , "Relating to national and cultural origins" , "Relating to a cultural grouping" .)