Crossword Genius

Short fat kid visits relations (5-5)

Ross

I believe the answer is:

great-aunts

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This clue could be a double definition.

'short fat kid visits' is the first definition.
Although both the answer and definition are plural nouns, I don't understand how they can define each other.

'relations' is the second definition.
(great-aunt is a kind of relation)

Can you help me to learn more?

I've seen this clue in The Times.
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