Barker, a crossword compiler from Eire (5,6)
I believe the answer is:
irish setter
'barker' is the definition.
(I've seen this before)
'a crossword compiler from eire' is the wordplay.
I cannot quite understand how this works, but
'compiler' could be 'setter' (both can mean a writer of crosswords) and 'setter' is found in the answer.
'from eire' could be 'irish' (I've seen this before) and 'irish' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for irish setter that I've seen before include "best friend" , "Dog with dark red coat" , "Dog from the Emerald Isle" , "Kind of dog" , "Breed of dog" .)