Dagger part (4)
'dagger part' is the definition.
('hilt' is part of 'dagger')
This is all the clue.
(Other definitions for hilt that I've seen before include "Handle of a sword or dagger" , "Handle of bladed weapon" , "One may back up to this" , "Sword/dagger handle" .)
(Other definitions for blade that I've seen before include "Young chap, dashing" , "London rail terminus" , "Flat part of an oar" , "See 24 Across" , "Leaf, of grass, say" .)