Crossword Genius

Indignation, after river blocked - no power now? (6)

Ross

I believe the answer is:

outage

'no power now?' is the definition.
(period with no power)

I can't explain the rest of the clue.

(Other definitions for outage that I've seen before include "Temporary suspension of operation" , "loss of power" , "Emaciated" , "Gap in power supply" , "time of no power" .)

I've seen this clue in The Independent.
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