Poet who makes a big hit in American sport (5)
I believe the answer is:
homer
This might be a double definition.
'poet who makes a big' is the first definition.
'Homer' can be an answer for 'poet' (Homer is an example). I am unsure of the rest of the definition.
'hit in american sport' is the second definition.
'homer' can be an answer for 'hit' (homer is a kind of hit). I am not sure about the 'in american sport' bit.
Can you help me to learn more?
(Other definitions for homer that I've seen before include "Greek poet - TV's Simpson" , "Greek author; pigeon" , "successful run in America?" , "Great Greek who wrote The Iliad" , "Bird" .)