Person fooling with spray set about new carpet (13)
I believe the answer is:
kidderminster
'carpet' is the definition.
(I've seen this before)
'person fooling with spray set about new' is the wordplay.
'person fooling' becomes 'kidder'.
'with' is a charade indicator (letters next to each other).
'spray' becomes 'mister' (spray device).
'set about' is an insertion indicator.
'new' becomes 'n'.
'mister' enclosing 'n' is 'minster'.
'kidder'+'minster'='KIDDERMINSTER'
(Other definitions for kidderminster that I've seen before include "in the Midlands" , "Carpet-making town of Worcestershire" , "Town on the Stour" , "Town renowned for carpets" , "Carpet town" .)