Crossword Genius

From the outset, obsessed with loving every tiny young bird (5)

Ross

I believe the answer is:

owlet

I'm a little stuck... Click here to teach me more about this clue!

'young bird' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for owlet that I've seen before include "who'll give a hoot?" , "Little nocturnal bird" , "Wise young" , "Young nocturnal flier" , "Baby bird; moth" .)

I've seen this clue in The Irish Times.
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