Go or come back (6)
I believe the answer is:
return
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">go</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that return is a type of return)</span><br/ ><br/ >'<span class="explanation-format__original">come back</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for return that I've seen before include "hit back?" , "second half of journey" , "Reappear" , "get back to original state" , "Send, bring or come back" .)