Pulsate; flog (4)
I believe the answer is:
beat
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">pulsate</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">flog</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for beat that I've seen before include "Master" , "Tan" , "Defeat; pulsate" , "Thrash with rhythm?" , "Rhythmic musical unit" .)