Bird, young one, on a river (9)

I believe the answer is:

chickadee

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

'young one on a river' is the wordplay.
'young one' becomes 'chick' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'on' says to put letters next to each other.
'river' becomes 'Dee' (River Dee).
'chick'+'a'+'dee'='CHICKADEE'

Can you help me to learn more?

(Other definitions for chickadee that I've seen before include "US bird" , "flier from America" .)

I've seen this clue in The Sunday Times.

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