Lohengrin's bride (4)
I believe the answer is:
elsa
'lohengrin's bride' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for elsa that I've seen before include "Girl" , "___ Schiaparelli, Italian-born French fashion designer d. 1973" , "Big cat" , "Lioness (born free in Kenya)" , "Famous lioness" .)