Show appreciation of (4)

I believe the answer is:
clap
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">show appreciation of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(as in applause)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for clap that I've seen before include "A meeting of hands" , "Applaud manually" , "Applaud in manual way" , "Strike hands together to applaud" , "Audibly show approval" .)