Okay to support prisoner put in a cell? (7)
I believe the answer is:
confine
'put in a cell?' is the definition.
'okay to support prisoner' is the wordplay.
'okay' becomes 'fine' (both are ways of saying 'yes').
'to support' says to put letters next to each other.
'prisoner' becomes 'con' (abbreviation for 'convict').
'fine' after 'con' is 'CONFINE'.
(Other definitions for confine that I've seen before include "Keep within limits" , "pen" , "Incarcerate" , "Shut in" , "Restrict (to an area)" .)