Invasion (4)
'invasion' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for raid that I've seen before include "Maraud" , "Surprise police visit" , "Rapid surprise attack" , "Rifle" , "Invade" .)
'invasion' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for incursion that I've seen before include "Foray" , "Sudden attack" , "Attack made into enemy territory" , "Hostile raid" .)