Greek character given retreat that's secluded in warm wind (7)
I believe the answer is:
chinook
'warm wind' is the definition.
(I've seen this before)
'greek character given retreat' is the wordplay.
'greek character' becomes 'chi' (letter from the Greek alphabet).
'given' is a charade indicator (letters next to each other).
'retreat' becomes 'nook' (nook is a kind of retreat).
'chi'+'nook'='CHINOOK'
'that's secluded in' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for chinook that I've seen before include "Warm dry wind of the Rockies - large Pacific salmon" , "Arctic wind" , "nickname of US State" , "What blows" , "Native American - wind - helicopter" .)