Carved (6)
(Other definitions for etched that I've seen before include "Incised" , "Cut or impressed into a surface" , "Made lines on metal with acid" , "Engraved, eg, by acid" , "Carved on metal with acid" .)
'carved' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for sliced that I've seen before include "Carved" , "Make a clean cut through" , "Cut into thin sections" , "Hit a ball so as to impart a spin" , "Thinly cut" .)