QBE filing trumpet? (8)

I believe the answer is:

proclaim

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'trumpet?' is the definition.
(trumpeting is a kind of proclaiming)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for proclaim that I've seen before include "Make a public announcement" , "Announce officially or declare publicly" , "Herald" , "Declare formally" , "shout from the housetops" .)

I've seen this clue in the Sydney Morning Herald.

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