Not tied (6)

I believe the answer is:

undone

(Other definitions for undone that I've seen before include "Ruined - no longer fastened" , "Ruined or dismantled" , "Not finished; ruined" , "Brought to ruin or destruction - or not buttoned" , "Brought to ruin or buttons not fastened" .)

I've seen this clue in the Penny Press.

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