Cold country, some say (7)
I believe the answer is:
catarrh
'cold' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for catarrh that I've seen before include "Head cold" , "(Inflammation causing) excessive mucus" , "Nasal build-up" , "Arch rat with inflammation of mucous membrane" , "Arch rat with inflamed mucous membrane" .)