Mutual (10)
I believe the answer is:
reciprocal
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mutual</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 reciprocal that I've seen before include "Done in return" , "Cross" , "Mutual" , "with give and take" .)