Crossword Genius

Lamb tender for children to enjoy? (2,4)

Ross

I believe the answer is:

bo peep

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'lamb' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for bo peep that I've seen before include "little character tending sheep" , "Nursery rhyme shepherdess" .)

I've seen this clue in The Sun.
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