Yeoman warder of the Tower of London (9)
I believe the answer is:
beefeater
'yeoman warder of the tower of london' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for beefeater that I've seen before include "no vegetarian?" , "Yeoman of the Guard; carnivore" , "One might guard" , "Yeoman warder of the Tower of London" , "Royal servant" .)