Perform lines one's produced for play? (4)
I believe the answer is:
doll
'one's produced for play?' is the definition.
(a doll might be used for play by children)
'perform lines' is the wordplay.
'perform' becomes 'do' ('do' can be a synonym of 'perform').
'lines' becomes 'll' (I've seen this in other clues**).
'do'+'ll'='DOLL'
(Other definitions for doll that I've seen before include "Toy baby" , "Puppet" , "Play figure" , "Child's toy figure" , "Child's plaything" .)