Simpson, the Greek poet (5)
I believe the answer is:
homer
'the greek poet' is the definition.
(ancient Greek poet)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for homer that I've seen before include "trained to get back to house" , "Pigeon; Greek poet" , "Greek poet, c. 800 BC" , "Trained pigeon" , "Epic poet - score at baseball - kind of pigeon" .)