Crossword Genius

The force behind a current movement (5)

Ross

I believe the answer is:

volts

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'the force behind a current movement' is the definition.
I can't tell whether this defines the answer.

'the force behind a current movement' is the wordplay.
'the force' becomes 'volt' (I have seen 'little force' mean 'volt' so perhaps 'force' could also mean 'volt').
'behind' is a charade indicator (letters next to each other).
'a current movement' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'volt'+'s'='VOLTS'

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