Armed guard (6)
I believe the answer is:
escort
'armed guard' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for escort that I've seen before include "Companion in corset, perhaps military" , "17 [DESTROYER]" , "Companion, perhaps for protection" , "Accompany, to protect perhaps" , "Provide company - car - guard" .)