Geographic description of the fields of Athenry (8)
I believe the answer is:
lowlands
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for lowlands that I've seen before include "Southern part of Scotland, not mountainous" , "Area of Scotland" , "Natural depressions" , "Owls land (anag.)" , "Areas that are not mountainous, in Scotland, say" .)