Crossword Genius

Squared stone for masonry (6)

Ross

I believe the answer is:

ashlar

(Other definitions for ashlar that I've seen before include "Dressed stone block" , "Dressed stone for facing (A, not E)" , "Rectangular block of cut stone" , "Has Lar produced squared stone?" , "Rash Al could produce cut stone" .)

I've seen this clue in the Sydney Morning Herald.
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