I need tea cooked for prisoner (8)
I believe the answer is:
detainee
'for prisoner' is the definition.
(detainee is a kind of prisoner)
'i need tea cooked' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'i'+'need'+'tea'='ineedtea'
'ineedtea' anagrammed gives 'DETAINEE'.
(Other definitions for detainee that I've seen before include "Someone held in custody" , "confined person" , "Person kept in custody" , "One is held under guard, for political reasons perhaps" , "Prisoner" .)