An assertion from the Speaker offering approval (7)

I believe the answer is:

acclaim

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'approval' is the definition.
(acclaim is a kind of approval)

I don't understand how the rest of the clue works.

(Other definitions for acclaim that I've seen before include "Enthusiastic and public praise" , "Enthusiastic approval" , "Credit" , "Great public praise" , "Welcome enthusiastically" .)

I've seen this clue in The Times.

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