Carefully planned complex (9)
I believe the answer is:
elaborate
I believe this is a double definition.
'carefully planned' is the first definition.
(elaborate can mean convoluted)
'complex' is the second definition.
(I've seen this before)
(Other definitions for elaborate that I've seen before include "Work out or describe in detail" , "Complicate" , "involved" , "Describe in detail, being complicated" , "flesh out?" .)