With two blades, makes incisions, extracting middle piece and regularly rinses innards (8)
I believe the answer is:
scissors
'rinses innards' is the definition.
The answer and definition can be both to do with contact as well as being verbs in their -s form.
Maybe you can see a link between them that I don't see?
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scissors that I've seen before include "Tool with two crossed blades" , "Small shears" , "Cutting tool" , "Double-edged implement" , "Cutting device with two long blades" .)