Crossword Genius

Revelation of artillery (9)

Ross

I believe the answer is:

bombshell

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'revelation' is the first definition.
(thesaurus)

'artillery' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'of' acts as a link.

Can you help me to learn more?

(Other definitions for bombshell that I've seen before include "big disappointment" , "Piece of devastating news" , "Terrible shock" , "That really is surprising" , "attractive blonde" .)

I've seen this clue in The Mirror.
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