Honour actor finally playing Shakespearean role (6)
I believe the answer is:
oberon
'shakespearean role' is the definition.
(I've seen this before)
'honour actor finally playing' is the wordplay.
'honour' becomes 'obe' (Order of the British Empire award).
'finally' suggests the final letters.
'playing' becomes 'on' (on can mean playing or performing).
The final letter of 'actor' is 'r'.
'obe'+'r'+'on'='OBERON'
(Other definitions for oberon that I've seen before include "Titania's husband" , "Borneo (anag)" , "Fairy king - no bore (anag)" , "top charmer!" , "charming king" .)