Girl eats dace cooked in college (7)
I believe the answer is:
academy
'college' is the definition.
(both can mean an educational institution)
'girl eats dace cooked' is the wordplay.
'girl' becomes 'amy' ().
'eats' means one lot of letters goes inside another.
'cooked' indicates an anagram (letters cooked into a new form).
'dace' anagrammed gives 'cade'.
'amy' enclosing 'cade' is 'ACADEMY'.
'in' is the link.
(Other definitions for academy that I've seen before include "Specialised educational establishment" , "Centre of learning" , "Specialist school" , "School for specialised education" , "Place of learning" .)