Strange person (7)
I believe the answer is:
oddball
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">strange person</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oddball that I've seen before include "case" , "Unusual" , "Crackpot" , "eccentric type" , "Strange, bizarre" .)