Romeo finds help after the attack (4)
I believe the answer is:
raid
'the attack' is the definition.
(raid is a kind of attack)
'romeo finds help' is the wordplay.
'romeo' becomes 'r' (phonetic alphabet: alpha, bravo, charlie etc.).
'finds' says to put letters next to each other.
'help' becomes 'aid' (synonyms).
'r'+'aid'='RAID'
'after' is the link.
(Other definitions for raid that I've seen before include "Maraud" , "Search by police without warning" , "Sally" , "military operation" , "A sudden attack or incursion" .)