Country some reach in Asia (5)
I believe the answer is:
china
'country' is the definition.
(China is an example)
'some reach in asia' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'CHINA' is hidden within 'reach in asia'.
(Other definitions for china that I've seen before include "foreign country" , "country out east" , "friend or companion" , "Dresden, perhaps" , "set of porcelain" .)