Radiation found in European embassy (8)
I believe the answer is:
emission
'radiation' is the definition.
(I've seen this before)
'european embassy' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'embassy' becomes 'mission' (I've seen this in other clues).
'e'+'mission'='EMISSION'
'found in' acts as a link.
(Other definitions for emission that I've seen before include "Release" , "radiation leakage?" , "Going out" , "it gets thrown out" , "Sending forth" .)