Complicated, involved (9)
I believe the answer is:
intricate
I believe this is a double definition.
'complicated' is the first definition.
(I've seen this before)
'involved' is the second definition.
(synonyms)
(Other definitions for intricate that I've seen before include "Entangled" , "puzzlingly obscure" , "Complicated, detailed" , "Convoluted" , "ornate" .)