Great popular enthusiasm for this section of sacred music (4,8)

'great popular enthusiasm for this' is the definition.
(a mass movement has popular support)

'section of sacred music' is the wordplay.
I cannot quite understand how this works, but
'section' could be 's' (legal abbreviation) and 's' is present in the answer.
'of' could be 'o' and 'o' is located in the answer.
'music' could be 'me' and 'me' is present in the answer.
This may be the basis of the clue (or it may be nonsense).