Answer, react (7)

I believe the answer is:
respond
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">answer</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that answer is a more specific form of respond)</span><br/ ><br/ >'<span class="explanation-format__original">react</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that respond is a more specific form of react)</span><br/ ><br/ ></span>
(Other definitions for respond that I've seen before include "React (positively) to a stimulus or treatment" , "Come back" , "State in reply" , "Answer back" , "Answer or react" .)