Wild dog kept in a building overseas (5)
I believe the answer is:
dingo
'wild dog' is the definition.
(I know that dingo is a type of wild dog)
'in a building overseas' is the wordplay.
'in' says the answer is hidden in the clue.
'DINGO' can be found hidden inside 'building overseas'.
'kept' is the link.
(Other definitions for dingo that I've seen before include "One running wild in Australia" , "Wild dog of Oz" , "Aus. wild dog" , "Wild creature" , "Wild animal" .)