Decorated garden lad redesigned (9)
I believe the answer is:
garlanded
'decorated' is the definition.
(garlanding is a kind of decorating)
'garden lad redesigned' is the wordplay.
'redesigned' indicates anagramming the letters.
'garden'+'lad'='gardenlad'
'gardenlad' is an anagram of 'GARLANDED'.
(Other definitions for garlanded that I've seen before include "Honoured" , "with distinction" , "adorned with flowers" , "swathed in leaves" , "bays (around head)" .)