Fiery heap (4)
I believe the answer is:
pyre
'fiery heap' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pyre that I've seen before include "Heap of combustible material for burning a body" , "centrepiece of funerary rite" , "Pile of wood for burning a dead body" , "Woodpile for burning the dead" , "Cremation mound" .)