Concurs (6)
I believe the answer is:
agrees
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">concurs</span>' is the definition.<br/ ><span class="explanation-format__explanation">('agree' can be a synonym of 'concur')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for agrees that I've seen before include "Shakes hands" , "Holds the same opinion" , "Assents, concurs" , "is in accord" , "Is of one mind" .)