Incursion or foray (4)
I believe the answer is:
raid
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">incursion</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(raid is a kind of incursion)</span><br/ ><br/ >'<span class="explanation-format__original">foray</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for raid that I've seen before include "A sudden military attack and withdrawal" , "Smash-and-grab?" , "bust" , "Surprise police visit" , "Sally" .)