Crossword Genius

Pyrotechnical sausages? (7)

Ross

I believe the answer is:

bangers

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'sausages?' is the definition.
(banger is a kind of sausage)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for bangers that I've seen before include "Crates" , "explosives?" , "Loud fireworks" , "Sausages" .)

I've seen this clue in the Evening Standard.
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