Deli device (6)
'deli device' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for slicer that I've seen before include "Cutting implement" , "One making ball curve" , "Device for, eg, cutting eggs" , "Machine for cutting, eg, ham" , "Kitchen utensil" .)
(Other definitions for scale that I've seen before include "A fish flake" , "Doh, ray, me" , "Hierarchy" , "plaque" , "Measure" .)