Always contributing to raid as individuals (9)
I believe the answer is:
severally
'as individuals' is the definition.
(severally can mean individually)
'always contributing to raid' is the wordplay.
'always' becomes 'ever' (synonyms).
'contributing to' is an insertion indicator.
'raid' becomes 'sally' (both can mean an attack).
'ever' put into 'sally' is 'SEVERALLY'.
(Other definitions for severally that I've seen before include "separately" , "respectively" , "Not all together" , "Singly" .)