Dine out with coppers, restricting study for freedom (12)
I believe the answer is:
independence
'for freedom' is the definition.
(independence is a kind of freedom)
'dine out with coppers restricting study' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'with' is a charade indicator (letters next to each other).
'coppers' becomes 'pence' (I've seen this before).
'restricting' means one lot of letters goes inside another.
'study' becomes 'den' (term for a study or office).
'pence' placed around 'den' is 'pendence'.
'dine' is an anagram of 'inde'.
'inde'+'pendence'='INDEPENDENCE'
(Other definitions for independence that I've seen before include "Freedom from outside control" , "Self-reliance" , "Autonomy" , "Freedom from another's authority" , "State of relying only on oneself" .)