Bizarre; unreal (7)
I believe the answer is:
surreal
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bizarre</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">unreal</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for surreal that I've seen before include "Dreamlike; like Dali's art" , "RA rules (anag.)" , "Weird - like Dali's paintings?" , "Outlandish" , "Involving fantastical imagery" .)