Summary or note in crisp style (6)
I believe the answer is:
precis
'summary' is the definition.
(I know that precis is a type of summary)
'note in crisp style' is the wordplay.
'note' becomes 'e' (musical note).
'in' is an insertion indicator.
'style' is an anagram indicator (style can mean to shape or design).
'crisp' is an anagram of 'prcis'.
'e' put into 'prcis' is 'PRECIS'.
'or' is the link.
(Other definitions for precis that I've seen before include "Sketchy summary" , "Summary of the main points" , "Abridgment (of text)" , "Summarize" , "Synopsis, summary" .)