Knight in shining armor
I believe the answer is:
hero
'knight in shining armor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hero that I've seen before include "Leander's lover - a person of courage" , "priestess of Aphrodite" , "eg Achilles" , "Leander's love" , "Person renowned for bravery" .)