Super design for a bag (5)
I believe the answer is:
purse
'for a bag' is the definition.
(purse is a kind of bag)
'super design' is the wordplay.
'design' is an anagram indicator.
'super' is an anagram of 'PURSE'.
(Other definitions for purse that I've seen before include "Means < to close" , "Prize money - prepare to whistle" , "Money bag; pucker" , "Money - contract" , "Sum of money as a prize - in pouch?" .)