Coot (6)
I believe the answer is:
geezer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">coot</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 geezer that I've seen before include "Old eccentric chap" , "Fellow (slang)" , "Man (slang)" , "Old man (sl)" , "Eccentric man, usually old" .)