wind + down, from the verb phrase.
winddown (usually uncountable, plural winddowns)
- The process of winding something down.
2009 August 2, “Letters: Risk and Regulation”, in New York Times:
- Keeping this power apart from the Fed also prevents it from being drawn into the political maelstrom of whether to lend funds to a weakened institution or to seize it for an orderly winddown.