Change about two degrees — where a degree was gained? (4,5)
I believe the answer is:
alma mater
'where a degree was gained?' is the definition.
(someone's old university or school)
'change about two degrees' is the wordplay.
'two degrees' can mean two substitutions for 'degree'.
'change' becomes 'alter' (synonyms).
'about' means one lot of letters goes inside another.
'degree' becomes 'MA' (Master of Arts is a type of degree).
'degree' becomes 'MA' (Master of Arts is a type of degree).
'ma'+'ma'='mama'
'alter' placed around 'mama' is 'ALMA MATER'.
(Other definitions for alma mater that I've seen before include "One's place of education" , "originally taught here?" , "College one attended" , "College (person) attended" , "Where one learned" .)