Bury in certain territories (5)
I believe the answer is:
inter
'bury' is the definition.
(to inter is to put into the ground)
'in certain territories' is the wordplay.
'in' says the answer is hidden in the clue.
'INTER' is hidden in the letters of 'certain territories'.
(Other definitions for inter that I've seen before include "I rent (anag.)" , "Prefix for between - bury it" , "Prefix meaning in the middle" , "top Italian side" , "Prefix meaning between or among" .)