Hostile incursion (6)
I believe the answer is:
inroad
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hostile incursion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for inroad that I've seen before include "One's intrusive" , "Encroachment; hostile attack" , "Sudden attack made into a country" , "Ordain (anag.)" , "Incursion, raid" .)