Concerned, implicated (8)
I believe the answer is:
involved
I believe this clue is a double definition.
'concerned' is the first definition.
(involving is a kind of concerning)
'implicated' is the second definition.
(similar in meaning)
(Other definitions for involved that I've seen before include "Having a relationship" , "Complex" , "Byzantine" , "Mixed up in, implicated" , "Complicated and concerned with" .)