Scott's Lady of the Lake (5)
I believe the answer is:
ellen
'scott's lady of the lake' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ellen that I've seen before include "-- DeGeneres, US actress" , "- Terry, Eng. actress" , "the Lady of the Lake" , "Dame - - Macarthur (naut.)" , "Terry perhaps" .)