Earth found in English pie section (7)
I believe the answer is:
episode
'section' is the definition.
(I know that episode is a type of section)
'earth found in english pie' is the wordplay.
'earth' becomes 'sod' (sod can mean a piece of earth).
'found in' indicates putting letters inside.
'english' becomes 'E' (abbreviation).
'e'+'pie'='epie'
'sod' placed inside 'epie' is 'EPISODE'.
(Other definitions for episode that I've seen before include "A chapter or incident" , "Set of incidents" , "One programme of a series" , "Distinctive incident" , "One of a related series of events" .)