Detailed —complicated (9)
I believe the answer is:
elaborate
I believe this clue is a double definition.
'detailed' is the first definition.
(synonyms)
'complicated' is the second definition.
(I've seen this in another clue)
(Other definitions for elaborate that I've seen before include "Very ornate or complex" , "Intricate - ornament" , "Present in further detail" , "Describe in detail, being complicated" , "Highly detailed" .)