High-tech scanner (3)
I believe the answer is:
cat
'high-tech scanner' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cat that I've seen before include "one's pyjamas? They're an excellent thing" , "Grimalkin" , "Animal; converter; boat" , "Lash < jazz fan" , "Feline mammel" .)