European vet on the radio? (5)
I believe the answer is:
czech
'european' is the definition.
(Czech is an example)
'vet on the radio?' is the wordplay.
'vet' becomes 'check' (vet can mean to test or check).
'on the radio?' indicates a 'sounds like' (homophone) clue (I've seen 'on the radio' mean this).
'check' is a homophone of 'CZECH'.
(Other definitions for czech that I've seen before include "Native of Prague, perhaps" , "One from Brno" , "foreign national" , "Eg, a native of Prague" , "European native" .)