What listeners in religious education practise (8)
I believe the answer is:
rehearse
'practise' is the definition.
('rehearse' can be a synonym of 'practise')
'what listeners in religious education' is the wordplay.
'what' becomes 'eh' (I've seen this in other clues).
'listeners' becomes 'ears'.
'in' is an insertion indicator.
'religious education' becomes 're'.
'eh'+'ears'='ehears'
'ehears' placed inside 're' is 'REHEARSE'.
(Other definitions for rehearse that I've seen before include "Go over" , "What actor does to prepare for play" , "Practice in theatre" , "Practise - run through" , "Practise before a public performance" .)