Cromwell's bodyguard? (9)
I believe the answer is:
protector
I believe this is a double definition.
'cromwell's' is the first definition.
(Oliver Cromwell was Lord Protector)
'bodyguard?' is the second definition.
(thesaurus)
(Other definitions for protector that I've seen before include "Patron" , "Box at Lord's say" , "Guardian; regent" , "Defender" .)