Table put to very good use (5)

I believe the answer is:

altar

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'table' is the definition.
(I know that altar is a type of table)

I don't understand the remainder of the clue.

(Other definitions for altar that I've seen before include "Sacred table" , "where sacrifices are made" , "Place of sacrifice" , "Sacrificial block" , "Sacrificial table" .)

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

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