Prisons (5)

I think it could be either:

cages

gaols

'prisons' is the definition.
(cage is a kind of prison)

This is the entire clue.

(Other definitions for cages that I've seen before include "prisons" , "Enclosures made or wire or metal bars" , "Enclosures for animals" , "Wild animal enclosures" , "Locks up" .)

I've seen this clue in the Sydney Morning Herald.

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