Bounce off the walls, say (4)
I believe the answer is:
echo
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bounce off the walls</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">say</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that say is a more specific form of recite)</span><br/ ><br/ ></span>
(Other definitions for echo that I've seen before include "Close imitation" , "Reflect sound" , "Parrot" , "copy" , "Reproduction" .)