Wonderful purse design, British (6)
I believe the answer is:
superb
'wonderful' is the definition.
(I know that wonderful can be written as superb)
'purse design british' is the wordplay.
'design' is an anagram indicator.
'british' becomes 'b' (abbreviation e.g. in BBC).
'purse' is an anagram of 'super'.
'super'+'b'='SUPERB'
(Other definitions for superb that I've seen before include "Of surpassing excellence" , "Quite splendid, really excellent" , "Triumphantly effective" , "Tiptop" , "Dusty product of spider" .)