Room for good investments? (8)

I believe the answer is:

sacristy

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'room' is the definition.
(sacristy is a kind of room)

I can't explain the remainder of the clue.

(Other definitions for sacristy that I've seen before include "Satyr (sic) found in church storage room" , "Where sacred vessels are kept in church" , "Room in church for vestments etc." , "Part of church" , "Vestry" .)

I've seen this clue in The Globe and Mail.

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