Advantages releasing vast list of items (6)

I believe the answer is:

agenda

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'list of items' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for agenda that I've seen before include "things to discuss" , "Table of business" , "Meet to discuss this" , "Scheme" , "Timetable" .)

I've seen this clue in the Irish Times (Crosaire) and the Irish Times.

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