Blade snubbed girl (7)
I believe the answer is:
cutlass
'blade' is the definition.
(cutlass is a kind of blade)
'snubbed girl' is the wordplay.
'snubbed' becomes 'cut' (to snub something can be to cut its end off).
'girl' becomes 'lass' (lass is a kind of girl).
'cut'+'lass'='CUTLASS'
(Other definitions for cutlass that I've seen before include "Curved, one-edged sword" , "Short, broad-bladed sword" , "Short broad sword" , "Short, heavy curved sword" , "Piratical sword" .)