Observed Greek character in organised crime (7)
I believe the answer is:
empiric
'observed greek' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
'character in organised crime' is the wordplay.
'character' becomes 'pi' (pi is a kind of character).
'in' is an insertion indicator.
'organised' is an anagram indicator.
'crime' with letters rearranged gives 'emric'.
'pi' inserted inside 'emric' is 'EMPIRIC'.
Can you help me to learn more?
(Other definitions for empiric that I've seen before include "working by trial and error" , "medical quack" , "Based on experience" , "Derived from experiment and observation rather than theory" , "Old quack doctor" .)