The last letter from Greece (5)
I believe the answer is:
omega
I believe this is a double definition.
'the last' is the first definition.
(I've seen this before)
'letter from greece' is the second definition.
(letter from the Greek alphabet)
(Other definitions for omega that I've seen before include "Last letter of the Greek alphabet" , "letter from abroad" , "symbol of resistance?" , "character in Greek literature?" , "End of sequence" .)