Prohibition restricting entitlement a lot at sunrise? (6,3,5)
I believe the answer is:
bright and early
'at sunrise?' is the definition.
(as in getting up bright and early)
'prohibition restricting entitlement a lot' is the wordplay.
'prohibition' becomes 'ban' (synonyms).
'restricting' means one lot of letters goes inside another.
'entitlement' becomes 'right' (I've seen this in another clue).
'a lot' becomes 'dearly' (as in paying dearly for something).
'ban' enclosing 'right' is 'brightan'.
'brightan'+'dearly'='BRIGHT AND EARLY'
(Other definitions for bright and early that I've seen before include "in good time" , "first thing" , "At the crack of dawn" .)