A pose adopted by a fabulous Greek (5)
I believe the answer is:
aesop
'a fabulous greek' is the definition.
(I've seen this in another clue)
'a pose adopted' is the wordplay.
'a pose' can be anagrammed to 'AESOP'.
However, I'm not clear how this is indicated.
'by' acts as a link.
Can you help me to learn more?
(Other definitions for aesop that I've seen before include "Poses as ancient Greek writer" , "Fable-teller" , "Greek storyteller" , "Greek fabulist (Tortoise and the Hare)" , "Greek author, famous for his fables" .)