Record is put with poem, part of a series (7)
I believe the answer is:
episode
'part of a series' is the definition.
(a TV series is made up of episodes)
'record is put with poem' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'put with' means one lot of letters go next to another.
'poem' becomes 'ode' (ode is a kind of poem).
'ep'+'is'+'ode'='EPISODE'
(Other definitions for episode that I've seen before include "Event or series of events in a story" , "Incident in a story or part of a serial" , "One part of a series" , "One part of a serial" , "Instalment of broadcast serial" .)