Irish poet Heaney (6)
I believe the answer is:
seamus
'irish poet heaney' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for seamus that I've seen before include "Irish form of James" , "Irish poet, b. 1939" , "- Heaney, Irish poet" , "Irishman?" .)