Plan to produce a decorative pattern (6)
I believe the answer is:
design
I believe this clue is a triple definition!
'plan' is the first definition.
(design is a kind of plan)
'to produce' is the second definition.
(thesaurus)
'a decorative pattern' is the third definition.
(I've seen this before)
(Other definitions for design that I've seen before include "Plan, drawing" , "Purpose, pattern" , "Singed (anag.)" , "Signed up for fashion plan" , "Provide blueprint" .)