Knight of soul (6)
I believe the answer is:
gladys
'knight of soul' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gladys that I've seen before include "- Cooper, Eng. actress" , "Girl's name" , "- Knight and the Pips (Motown)" , "Lady's name" , "Female name" .)