Record one's lines for scene (7)
I believe the answer is:
episode
'scene' is the definition.
(thesaurus)
'record one's lines' is the wordplay.
'record' becomes 'ep'.
'one's' becomes 'is' (roman numeral).
'lines' becomes 'ode' (I've seen this before).
'ep'+'is'+'ode'='EPISODE'
'for' is the link.
(Other definitions for episode that I've seen before include "Distinctive incident" , "Event or series of events in a story" , "Distinctive happening" , "Incident or one part of a story" , "One part of a series" .)