Sip beer regularly in teetotal country (5)
I believe the answer is:
tibet
'country' is the definition.
(Tibet is an example)
'sip beer regularly in teetotal' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'in' means one lot of letters goes inside another.
'teetotal' becomes 'tt' (abbreviation).
'sip'+'beer'='sipbeer'
The alternate letters of 'sipbeer' are 'ibe'.
'ibe' put into 'tt' is 'TIBET'.
(Other definitions for tibet that I've seen before include "Nepal''s neighbour" , "Home country of the Dalai Lama (5)" , "Part of Asia" , "Himalayan region controlled by China" , "Region of SW China" .)