Get along without power at the seaside (5)
I believe the answer is:
coast
'the seaside' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
(Other definitions for coast that I've seen before include "Diminish, lessen" , "Ride down a hill without using power" , "Run without power" , "Shoreline" , "Seaside - freewheel" .)