Clown is already prepared for Henry VIII role (8,6)
I believe the answer is:
cardinal wolsey
'henry viii role' is the definition.
(character in Shakespeare's play Henry VIII)
'clown is already prepared' is the wordplay.
'prepared' indicates an anagram.
'clown'+'is'+'already'='clownisalready'
'clownisalready' with letters rearranged gives 'CARDINAL WOLSEY'.
'for' acts as a link.
(Other definitions for cardinal wolsey that I've seen before include "Lord Chancellor" , "Shakespeare role" .)