Male relative tucking into the Orient's amazing food (8)
I believe the answer is:
ambrosia
'amazing food' is the definition.
(ambrosia is the food of the Gods in Greek myth)
'male relative tucking into the orient's' is the wordplay.
'male' becomes 'm' (common abbreviation).
'relative' becomes 'bro' (short for brother).
'tucking into' means one lot of letters goes inside another.
'the orient' becomes 'asia' (I've seen this in another clue).
'm'+'bro'='mbro'
'mbro' put within 'asia' is 'AMBROSIA'.
(Other definitions for ambrosia that I've seen before include "Heavenly food" , "luxury food" , "dish fit for the gods when cooked without salt" , "Siam boar as food for the gods" , "Divine food" .)