Building block (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">building block</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for brick that I've seen before include "Building unit?" , "Clay building block" , "Baked clay" , "Building material" , "Reliable person" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">building block</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for unit that I've seen before include "Separate part" , "Operational team" , "hospital department" , "One; military group" , "Self-contained section" .)