The legendary sword of King Arthur (9)

I believe the answer is:

excalibur

'the legendary sword of king arthur' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for excalibur that I've seen before include "Traditional weapon" , "King Arthur's magic sword" , "King Arthur's magical sword" , "The legendary sword of King Arthur" , "Steel flourished years ago" .)

I've seen this clue in The Irish Times, the Irish Times (Simplex) and The Independent.

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