Confinement makes Ted intone composition (9)
I believe the answer is:
detention
'confinement' is the definition.
(I know that detention is a type of confinement)
'makes ted intone composition' is the wordplay.
'makes' indicates an anagram.
'composition' indicates anagramming the letters (letters arranged or composed in a different order).
'ted' with letters rearranged gives 'det'.
'intone' with letters rearranged gives 'ention'.
'det'+'ention'='DETENTION'
(Other definitions for detention that I've seen before include "Confinement" , "Arrest; school punishment" , "Custody" , "After-school punishment" .)