Capital in Helsinki, evidently (4)
I believe the answer is:
kiev
'capital' is the definition.
(Kiev is an example)
'in helsinki evidently' is the wordplay.
'in' says the answer is hidden in the clue.
'KIEV' is hidden in the letters of 'helsinki evidently'.
(Other definitions for kiev that I've seen before include "Ukrainian capital" , "place in eastern Europe" , "Ukraine's capital - way of cooking chicken" , "Ukrainian city" , "Ukraine's largest city" .)