Crossword Genius

One may be powerless without it (11)

Ross

I believe the answer is:

electricity

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

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(Other definitions for electricity that I've seen before include "One form of energy" , "Domestic energy supply" , "Current supplier" , "Energy associated with charged particles" , "Energy from movement of charged particles" .)

I've seen this clue in The Globe and Mail.
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