Normal; commonplace (8)
I believe the answer is:
ordinary
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">normal</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">commonplace</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for ordinary that I've seen before include "Normal, mundane" , "simple charge" , "Run-of-the-mill" , "Commonplace, avergae" , "standard" .)