To be cut with any switch blade (7)
I believe the answer is:
bayonet
'switch blade' is the definition.
'bayonet' can be an answer for 'blade' (I've seen this before). I'm not certain of the 'switch' bit.
'to be cut with any' is the wordplay.
'cut with' indicates anagramming the letters.
'to'+'be'='tobe'
'tobe' anagrammed with 'any' makes 'BAYONET'.
Can you help me to learn more?
(Other definitions for bayonet that I've seen before include "Knife fixed to the end of a rifle" , "Muzzle blade" , "one's attached to one's rifle - that's sort of fitting" , "Lethal Weapon" , "Dagger attached to 26 Across" .)