Crossword Genius

First on display to arrange big noise for military (3,5,7)

Ross

I believe the answer is:

air chief marshal

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'big noise for military' is the definition.
(high-ranking officer in an air force)

I can't explain the remainder of the clue.

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(Another definition for air chief marshal that I've seen is " Senior officer".)

I've seen this clue in The Times.
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