Oblivious (7)
I believe the answer is:
unaware
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oblivious</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for unaware that I've seen before include "In the dark" , "Not informed - ignorant (of)" , "Nescient" , "Not conscious of what is going on" , "Heedless" .)