Strong desire or impulse (4)
I believe the answer is:
urge
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">strong desire</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">impulse</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for urge that I've seen before include "Incite to action" , "Advise earnestly, prod" , "Press; drive" , "Encourage (to do something)" , "Itch" .)