Crossword Genius

Childish place to have an ache? (5)

Ross

I believe the answer is:

tummy

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

This might be a double definition.

'childish place' is the first definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'an ache?' is the second definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'to have' acts as a link.

Can you help me to learn more?

(Other definitions for tummy that I've seen before include "Colloquial stomach" , "Stomach (colloq.)" , "Belly" , "Stomach (informal)" , "Stomach, abdomen" .)

I've seen this clue in the Evening Standard.
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