Bird a little concerned (4)

I believe the answer is:

erne

'bird' is the definition.
(erne is a kind of bird)

'a little concerned' is the wordplay.
'a little' indicates the answer is hidden within the clue.
'ERNE' is hidden in the letters of 'concerned'.

(Other definitions for erne that I've seen before include "Great lake in Fermanagh with lots of islands" , "one that catches fish?" , "Island-studded lake in Fermanagh" , "flyer in the main" , "'Sea-eagle, river and lough (4)'" .)

I've seen this clue in The Telegraph.

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