Cello piece, not very electrifying (4)

I believe the answer is:

cell

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'cello' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cell that I've seen before include "Small compartment" , "Place for a prisoner" , "Dungeon" , "Monastic room" , "required for current generation?" .)

I've seen this clue in the Evening Standard.

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