Raid on raid perhaps (6)
I believe the answer is:
inroad
'raid' is the definition.
(inroad can mean a raid or attack)
'on raid perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'on'+'raid'='onraid'
'onraid' with letters rearranged gives 'INROAD'.
(Other definitions for inroad that I've seen before include "Sudden attack made into a country" , "Foray" , "Incursion, raid" , "One's intrusive" , "Offensive" .)