Answer: flagstone

AnswerCrossword Clue
FLAGSTONEPatio piece
FLAGSTONEFlat paving rock.
FLAGSTONEPaving material.
FLAGSTONEPatio slab
FLAGSTONEHail author Irving?
FLAGSTONEPaving material
FLAGSTONETerrace surface, perhaps
FLAGSTONEFlat paving slab
flagstonea large paving stone
flagstoneA flat stone slab, typically rectangular or square, used for paving