Prohibited outback in the middle of the day? (3,2)
I believe the answer is:
not on
'prohibited' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'outback in the middle of the day?' is the wordplay.
'outback' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'in the' means one lot of letters goes inside another.
'middle of the day?' becomes 'noon' (I've seen this before).
't' placed inside 'noon' is 'NOT ON'.
Can you help me to learn more?
(Other definitions for not on that I've seen before include "It's unfeasible" , "Improper - impossible" , "Unacceptable (colloq.)" , "Informally, can't be accepted or tolerated" , "Definitely inadvisable" .)