Complex, rich in detail (9)
I believe the answer is:
elaborate
This clue is a double definition.
'complex' is the first definition.
(I've seen this in another clue)
'rich in detail' is the second definition.
(I've seen this in another clue)
(Other definitions for elaborate that I've seen before include "Highly detailed" , "Give more details" , "flesh out?" , "with added detail" , "Complicated, with many parts or details" .)