Chocolate after Colin passes out is elementary (8)
I believe the answer is:
inchoate
'is elementary' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for inchoate that I've seen before include "Undeveloped" , "Rudimentary, not fully formed" , "Action he took having just begun" , "Only half-formed" , "at an early stage" .)