What does the cryptic crossword clue "Retsina, as exotic cooking ingredient (4,5)" mean?

The definition is "ingredient". The wordplay uses an anagram. anagram of RETSINA, + AS = STARANISE; definition: "ingredient" The answer is STARANISE.

Retsina, as exotic cooking ingredient (4,5)

Guardian Cryptic #24259 | 6 Down | 2007-12-13 flower