Caretaker in Bury on WhatsApp? (7)
I believe the answer is:
interim
'caretaker' is the definition.
(I've seen this before)
'bury on whatsapp?' is the wordplay.
'bury' becomes 'inter' (to inter is to put into the ground).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'whatsapp?' becomes 'im' (I can't justify this - if you can you should believe this answer much more).
'inter'+'im'='INTERIM'
'in' is the link.
(Other definitions for interim that I've seen before include "Temporary - provisional" , "Stopgap" , ", I'm put in grave situation initially" , "not there for ever" , "Meantime - provisional" .)