
1) Clashingrocks
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https://www.crosswordclues.com/clue/symplegades

1) Mythological island
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https://www.crosswordclues.com/clue/symplegades

The Symplegades (z; Συμπληγάδες, Symplēgádes) or Clashing Rocks, also known as the Cyanean Rocks, were, according to Greek mythology, a pair of rocks at the Bosphorus that clashed together randomly. They were defeated by Jason and the Argonauts, who would have been lost and killed by the rocks except for Phineus` advice. Jason let a ....
Found on
http://en.wikipedia.org/wiki/Symplegades

(from the article `Argonaut`) ...the blind and aged king whose food was constantly polluted by the Harpies. After being freed by the winged sons of Boreas, Phineus told them the ...
Found on
http://www.britannica.com/eb/a-z/s/199

Clashing rocks at entrance to Black Sea; Argo passed through, causing them to become forever fixed.
Found on
https://www.infoplease.com/arts-entertainment/mythology/greek-and-roman-myt

a pair of rocky islands, at the entrance to the Black Sea, that often clashed together: Athena helped the Argonauts navigate them, after which they became fixed.
Found on
https://www.infoplease.com/dictionary/symplegades
No exact match found.