Tailless mountain goat found in dry region (5)
I believe the answer is:
tibet
'region' is the definition.
(Tibet is an example)
'tailless mountain goat found in dry' is the wordplay.
'tailless' means to remove the last letter.
'mountain goat' becomes 'ibex' (I've seen this before).
'found in' is an insertion indicator.
'dry' becomes 'tt' (abbreviation for teetotal).
'ibex' with its last letter removed is 'ibe'.
'ibe' inserted inside 'tt' is 'TIBET'.
(Other definitions for tibet that I've seen before include "Region of SW China" , "hilly region" , "State" , "Himalayan region controlled by China" , "region out East" .)