Famously Insoluble Knot in Ancient Legend

This page is the CodyCross answer for the clue below from Space Exploration, Group 919, Puzzle 5 (Roberta Bondar).

Question is: Famously Insoluble Knot in Ancient Legend

and the answer is: GORDIAN

Word Meaning:

GORDIAN — Alternative form of Gordian.

Definitions from Wiktionary.