Bury, in the meantime, I'm leaving (5)
I believe the answer is:
inter
'bury' is the definition.
('inter' can be a synonym of 'bury')
'meantime i'm leaving' is the wordplay.
'meantime' becomes 'interim' (I've seen this before).
'leaving' suggests deleting specific letters.
'interim' with 'im' taken out is 'INTER'.
'in the' is the link.
(Other definitions for inter that I've seen before include "top Italian side" , "Place into grave, tomb" , "Put under the earth" , "Send to ground" , "set underground" .)