The most common and most likely answer to this crossword clue is the 6 letter word BELIZE
I've seen this crossword clue in The Times
B
E
L
I
Z
E
More clues leading to the result BELIZE
- Zambian leader interrupts to contradict Central American nation
- Insect that buzzes around girl in the country
- Brief pint, drinking ‘Queen & Country‘
- Country girl’s bitten by insect
- Country of pronounced beauty and calm
- Country girl entertained by a queen maybe
- Busy person must accommodate Elizabeth in the country
- Brief pint, drinking 'Queen & Country'
- Falsify getting infiltrated by unknown country
Buddy explains!

The straight part
We know that "Central American nation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case central american nation = belize.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.