Crossword Genius

Come out of your shell, ducky! (5)

Ross

I believe the answer is:

hatch

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

'come out of your shell' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for hatch that I've seen before include "Breed" , "Emerge from shell" , "Incubate - plan" , "Think up" , "Devise" .)

I've seen this clue in the Evening Standard.
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