Make case to hold note that's repeatedly folded (7)
I believe the answer is:
pleated
'repeatedly folded' is the definition.
(eg a pleated item of clothing has multiple folds)
'make case to hold note' is the wordplay.
'make case' becomes 'plead' (as in making one's case to plead for something).
'to hold' indicates putting letters inside.
'note' becomes 'te'.
'plead' placed around 'te' is 'PLEATED'.
'that's' is the link.
(Other definitions for pleated that I've seen before include "Gathered" , "Given creases" , "With folds sewn in" , "Folded and sewn" , "Folded and stitched" .)