Prompt about missing bodyguard (6)
I believe the answer is:
minder
'bodyguard' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for minder that I've seen before include "Bodyguard (colloq.)" , "One looking after" , "One who objects" , "baby sitter?" , "One who looks after (someone or something)" .)