Crossword Genius

They can blow the lights out (5)

Ross

I believe the answer is:

fuses

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'lights out' is the definition.
The answer and definition can be both related to change as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for fuses that I've seen before include "Blends together as with heat" , "Blow one of these and lose your temper" , "bonds" , "Circuit breakers" , "Blends or amalgamates, say metals" .)

I've seen this clue in the Evening Standard.
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