Extremely unconventional (3-3)
I believe the answer is:
way-out
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">extremely unconventional</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 way-out that I've seen before include "Unconventional; exit" , "Exit, means of egress" , "Exit - weird" , "Offbeat" , "Extremely unconventional" .)