Crossword Genius

A mildly electrifying cello piece? (4)

Ross

I believe the answer is:

cell

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This clue could be a double definition.

'a mildly electrifying cello' is the first definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'piece?' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

Can you help me to learn more?

(Other definitions for cell that I've seen before include "American mobile" , "Dungeon" , "Chamber" , "Place of confinement" , "Lock-up room" .)

I've seen this clue in the Evening Standard.
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