Crowd or pack (3)
I believe the answer is:
jam
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">crowd</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(jam is a kind of crowd)</span><br/ ><br/ >'<span class="explanation-format__original">pack</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for jam that I've seen before include "Block signals" , "Fruit preserve" , "Preserve; pack tightly" , "Sweet stuff for bread - stuff it in" , "Troublesome situation" .)