Crossword Genius

Firm prepared collection (3)

Ross

I believe the answer is:

set

This clue is a triple definition!

'firm' is the first definition.
(both can mean fixed)

'prepared' is the second definition.
(set up or ready)

'collection' is the third definition.
(set is a kind of collection)

(Other definitions for set that I've seen before include "Congeal" , "Hard; place" , "Class" , "become firm" , "Mount (precious stone)" .)

I've seen this clue in The Times.
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