Aye (3)
I believe the answer is:
yes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aye</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 yes that I've seen before include "Aye" , "Oui" , "Of course" , "That's 27 [RIGHT]" , "Yea" .)