Bury nitre perhaps (5)
I believe the answer is:
inter
'bury' is the definition.
(to inter is to put into the ground)
'nitre perhaps' is the wordplay.
'perhaps' indicates an anagram.
'nitre' anagrammed gives 'INTER'.
(Other definitions for inter that I've seen before include "Entomb" , "Set deep" , "get put down!" , "I rent (anag.)" , "team from Italy" .)