Crossword Genius

Seat for sort of pigeon (5)

Ross

I believe the answer is:

stool

I believe this clue is a double definition.

'seat' is the first definition.
(stool is a kind of seat)

'sort of pigeon' is the second definition.
(a stool pigeon is a police informer)

'for' acts as a link.

(Other definitions for stool that I've seen before include "Motion" , "Seat without a back" , "place butt on one?" , "Armless seat" , "Three-legged backless seat" .)

I've seen this clue in The Times.
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