Weeps convulsively (4)
I believe the answer is:
sobs
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">weeps convulsively</span>' is the definition.<br/ ><span class="explanation-format__explanation">('sob' can be a synonym of 'weep convulsively')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for sobs that I've seen before include "Cries noisily" , "showing distress" , "cries uncontrollably" , "convulsions" , "Given evidence of distress" .)