Wonderful purse design (5)
I believe the answer is:
super
'wonderful' is the definition.
(I've seen this before)
'purse design' is the wordplay.
'design' is an anagram indicator.
'purse' anagrammed gives 'SUPER'.
(Other definitions for super that I've seen before include "Terrific, ace" , "Marvellous, terrific" , "of high quality" , "Informally terrific, splendid" , "Excellent; policeman" .)