Crossword Genius

Do what chickens do with old soap?> (10)

Ross

I believe the answer is:

crossroads

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

'do' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for crossroads that I've seen before include "Meeting of ways" , "critical situation?" , "Intersection of ways" , "Soap once" .)

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