Result of macaroni, if it cooks (12)
I believe the answer is:
ramification
'result' is the definition.
(thesaurus)
'macaroni if it cooks' is the wordplay.
'cooks' indicates anagramming the letters.
'macaroni'+'if'+'it'='macaroniifit'
'macaroniifit' anagrammed gives 'RAMIFICATION'.
'of' is the link.
(Other definitions for ramification that I've seen before include "Complicating consequence" , "Complex consequence (of an event)" .)