One Tibetan animal in rite cooked as food (8)
I believe the answer is:
teriyaki
'food' is the definition.
(teriyaki is a kind of food)
'one tibetan animal in rite cooked' is the wordplay.
'one' becomes 'i' (Roman numeral).
'tibetan animal' becomes 'yak' (I've seen this before).
'in' indicates putting letters inside.
'cooked' is an anagram indicator (letters cooked into a new form).
'i'+'yak'='iyak'
'rite' with letters rearranged gives 'teri'.
'iyak' going into 'teri' is 'TERIYAKI'.
'as' is the link.
(Other definitions for teriyaki that I've seen before include "Japanese cooking using sweet soy sauce" , "Japanese dish of beef, chicken or seafood, marinated in soy sauce" , "Japanese dish of cooked meat or seafood, marinated in soy sauce" , "Oriental food" , "Basted and broiled" .)