Piazza (6)
I believe the answer is:
square
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">piazza</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for square that I've seen before include "Geometric figure" , "Right-angled; plaza" , "Regular shape - fuddy-duddy" , "quits" , "Four-sided, regular polygon" .)