Scholarly boozer back in the money! (7)
I believe the answer is:
donnish
'scholarly' is the definition.
(similar in meaning)
'boozer back in the money' is the wordplay.
'boozer' becomes 'inn'.
'back' shows that the letters should be reversed in order.
'in the' indicates putting letters inside.
'money' becomes 'dosh' (slang term).
'inn' reversed gives 'nni'.
'nni' put into 'dosh' is 'DONNISH'.
(Other definitions for donnish that I've seen before include "Like fellow, perhaps" , "Scholarly" , "Lecturer probably is" , "Resembling academic" , "Typical of lecturer" .)