The most common and most likely answer to this crossword clue is the 6 letter word CHILLY
I've seen this crossword clue in The Sunday Telegraph
C
H
I
L
L
Y
More clues leading to the result CHILLY
- West of country’s undulating and cold
- Cold countryside at first and not flat
- Cuba’s mountainous and unwelcoming
- Cold peak in Cumbria, mountainous
- Unfriendly nation, reportedly
- Parky‘s having hot meal when on the radio
- Unfriendly country, we hear
- Unfriendly country named
- Cold empty cry around mound
- Cold or hot food for the audience
Buddy explains!

The straight part
We know that "Cold" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cold = chilly.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does CHILLY mean?
CHILLY adjective- Cold enough to cause discomfort.
- Feeling uncomfortably cold.
- Distant and cool; unfriendly.
- The pungent, spicy fresh or dried fruit of any of several cultivated varieties of capsicum peppers, used in cooking.
- Powdered chili pepper, used as a spice or flavouring in cooking.
- (Indian Chinese cuisine) a spicy stew of chicken or paneer, capsicum and onion, eaten as an appetizer.
- A dish made with chili peppers and other ingredients, such as beans and beef.
- (Cincinnati) Cincinnati chili.