Degree thus simple? (5)
I believe the answer is:
basic
'simple?' is the definition.
(similar in meaning)
'degree thus' is the wordplay.
'degree' becomes 'BA' (Bachelor of Arts).
'thus' becomes 'sic' (synonyms).
'ba'+'sic'='BASIC'
(Other definitions for basic that I've seen before include "Introductory" , "Elementary - without extras" , "Forming a foundation" , "Fundamental or rudimentary" , "No-frills" .)