European vet, we hear (5)
I believe the answer is:
czech
'european' is the definition.
(Czech is an example)
'vet we hear' is the wordplay.
'vet' becomes 'check' (vet can mean to test or check).
'we hear' shows a homophone (sound like).
'check' is a homophone of 'CZECH'.
(Other definitions for czech that I've seen before include "European native" , "foreign national" , "East European" , "European's" , "Native of Prague, perhaps" .)