Crossword Genius

Brick made of cinders, sand and cement (6,5)

Ross

I think it could be either:

Which length description are you looking for?:

11

6,5

breeze block

(Other definitions for breeze block that I've seen before include "Building brick" , "Lightweight brick" , "Large light brick" , "part of a build-up?" .)

I've seen this clue in The Guardian.
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