Qualification, to a certain extent (6)
I believe the answer is:
degree
This clue might be a double definition.
'qualification' is the first definition.
(university qualification)
'certain extent' is the second definition.
'degree' can be an answer for 'extent' (I've seen this in another clue). I am unsure of the 'certain' bit.
'to a' is the link.
Can you help me to learn more?
(Other definitions for degree that I've seen before include "It's given to college graduates" , "Extent - academic achievement" , "Academic award - 60 minutes" , "Gradation on a scale" , "Comparative amount" .)