Only played with new material (5)
I believe the answer is:
nylon
'material' is the definition.
(nylon is a kind of material)
'only played with new' is the wordplay.
'played with' indicates anagramming the letters.
'new' becomes 'n'.
'only' with its letters anagrammed with 'n' makes 'NYLON'.
(Other definitions for nylon that I've seen before include "may be damaged by running" , "Artificial yarn/fabric" , "Fibre of polymeric amides" , "Synthetic material used in textiles" , "Artificial cloth" .)