Accompany some corpse's cortege (6)
I believe the answer is:
escort
'accompany' is the definition.
(escorting is a kind of accompanying)
'some corpse's cortege' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'ESCORT' is hidden within 'corpses cortege'.
(Other definitions for escort that I've seen before include "wheels?" , "Business providing companions for an evening out" , "going in convoy" , "Companion, perhaps for protection" , "Act as companion, attend" .)