Crossword Genius

Scratched the surface? (6)

Ross

I believe the answer is:

etched

(Other definitions for etched that I've seen before include "Engraved, eg, by acid" , "Incised" , "Cut or impressed into a surface" , "Made lines on metal with acid" , "Carved on metal with acid" .)

I've seen this clue in The New York Times.
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