Express the same sentiment as (4)
I believe the answer is:
echo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">express the same sentiment as</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for echo that I've seen before include "Ape" , "Send back" , "Reverberate - nymph spurned by Narcissus" , "Sound following" , "Mythical nymph" .)