Redesigned client's pattern (7)
I believe the answer is:
stencil
'pattern' is the definition.
(thesaurus)
'redesigned client's' is the wordplay.
'redesigned' indicates an anagram.
'clients' is an anagram of 'STENCIL'.
(Other definitions for stencil that I've seen before include "Sheet with cut-out letters, pattern etc for copying" , "Cut sheet used for painting design through" , "Aid for drawing" , "outline" , "Reproduction device for clients" .)