Attack from right with support (4)
I believe the answer is:
raid
'attack' is the definition.
(raid is a kind of attack)
'right with support' is the wordplay.
'right' becomes 'r' (common abbreviation).
'with' says to put letters next to each other.
'support' becomes 'aid' ('aid' can be a synonym of 'support'**).
'r'+'aid'='RAID'
'from' acts as a link.
(Other definitions for raid that I've seen before include "bust" , "Surprise police visit" , "Assault, attack" , "Inroad" , "A sudden attack or incursion" .)