Tool with two crossed blades (8)
I believe the answer is:
scissors
'tool with two crossed blades' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for scissors that I've seen before include "Tool with two crossed blades" , "Cutting implement - outdated high jump" , "Cutting device with two long blades" , "Equipment for dealing with locks" , "Cutting instrument made of two joined blades with handles" .)