Record poem is included in event (7)
I believe the answer is:
episode
'event' is the definition.
(episode is a kind of event)
'record poem is included' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'poem' becomes 'ode' (ode is a type of poem).
'included' is an insertion indicator.
'ep'+'ode'='epode'
'epode' going around 'is' is 'EPISODE'.
'in' is the link.
(Other definitions for episode that I've seen before include "A chapter or incident" , "Bout" , "Story instalment" , "Instalment; incident" , "One part of a serial" .)