Country pub, unpleasant and noisy from time to time (8)
I believe the answer is:
barbados
'country' is the definition.
(I know that Barbados is a country)
'pub unpleasant and noisy from time to time' is the wordplay.
'pub' becomes 'bar' (both are drinking establishments).
'unpleasant' becomes 'bad'.
'and' says to put letters next to each other.
'from time to time' means one should take alternating letters (letters removed on a regular basis).
The alternate letters of 'noisy' are 'os'.
'bar'+'bad'+'os'='BARBADOS'
(Other definitions for barbados that I've seen before include "Most easterly West Indies island" , "part of Caribbean" , "Absorb ad about the West Indian island" , "Caribbean country" , "holiday island" .)