Others care for its offspring (6)

I believe the answer is:

cuckoo

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

'offspring' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for cuckoo that I've seen before include "Bananas" , "Doolally - bird" , "Daffy" , "Bird with a two-note call" , "No home bird, this" .)

I've seen this clue in The Globe and Mail.

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