Burn body of old woman found in Minoans' island (7)
I believe the answer is:
cremate
'burn' is the definition.
(cremating is a kind of burning)
'body of old woman found in minoans' island' is the wordplay.
'body of' suggests removing the centre (body can mean something's frame or exterior).
'old woman' becomes 'mama' (both can mean someone's mother).
'found in' means one lot of letters goes inside another.
'minoans' island' becomes 'crete' (I've seen this in another clue).
'mama' with its centre removed is 'ma'.
'ma' going into 'crete' is 'CREMATE'.
(Other definitions for cremate that I've seen before include "Destroy body by burning" , "Burn a body to ashes" , "Have a burn-up" , "Burn a corpse to ashes" , "set alight" .)