Family symbol (5)
I believe the answer is:
crest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">family symbol</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for crest that I've seen before include "Top point of hill or wave" , "Top line of a hill, mountain, or wave" , "Highest point" , "Summit - emblem - cockscomb" , "Peak - comb" .)