Son of Lancelot and Elaine in Arthurian legend (7)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
galahad
(Other definitions for galahad that I've seen before include "man of great virtue" , "The most virtuous knight of the King Arthur's Round Table" , "Son of 9" , "noble man" , "The most virtuous knight at the Arthurian Round Table" .)