Japanese object, being unusually tense about part of Europe (7)
I believe the answer is:
netsuke
'japanese object' is the definition.
(type of Japanese ornament)
'unusually tense about part of europe' is the wordplay.
'unusually' is an anagram indicator.
'about' indicates putting letters inside.
'part of europe' becomes 'UK' (the United Kingdom).
'tense' is an anagram of 'netse'.
'netse' enclosing 'uk' is 'NETSUKE'.
'being' is the link.
(Other definitions for netsuke that I've seen before include "Button-like ornament on a kimono sash - sue Kent (anag)" , "ornamental device" , "Small carved object on a Japanese costume" , "Japanese decoration" , "carved ornament from the East" .)