Crossword Genius

Where the younger person goes out to lunch? (5)

Ross

I believe the answer is:

potty

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

'where the younger person goes out to lunch?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

This is the entire clue.

Can you help me to learn more?

(Other definitions for potty that I've seen before include "Where youngster goes" , "Daft (informal)" , "Where kids go" , "sort of chamber?" , "Nuts" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app