Hard task including a learner in hymn tune (7)
I believe the answer is:
chorale
'hymn tune' is the definition.
(I've seen this in another clue)
'hard task including a learner' is the wordplay.
'hard task' becomes 'chore' (a chore is a difficult or boring task).
'including' is an insertion indicator.
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'a'+'l'='al'
'chore' going around 'al' is 'CHORALE'.
'in' is the link.
(Other definitions for chorale that I've seen before include "Simple hymn tune" , "Composition" , "vocal music" , "Lutheran hymn-tune" , "Psalm or hymn tune" .)