The Final Part; Ultimate, Sour Conclusion

This page is the CodyCross answer for the clue below from City Life, Group 1654, Puzzle 3 (Helicopters).

Question is: The Final Part; Ultimate, Sour Conclusion

and the answer is: BITTEREND

Word Meaning:

BITTER END — (nautical) That part of an anchor cable which is abaft the bitts and thus remains inboard when a ship is riding at anchor.

Definitions from Wiktionary.