Refinement, for example, in eastern weapon (8)
I believe the answer is:
elegance
'refinement' is the definition.
(I've seen this before)
'example in eastern weapon' is the wordplay.
'example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'in' is an insertion indicator.
'eastern' becomes 'e'.
'weapon' becomes 'lance' (lance is a kind of weapon).
'e'+'lance'='elance'
'eg' put within 'elance' is 'ELEGANCE'.
'for' is the link.
(Other definitions for elegance that I've seen before include "Grace, style" , "Gracefulness" , "Fine quality" , "Graceful appearance or manner" , "Graceful refinement" .)