Test for dentist before and after qualifying? (4,11)
I believe the answer is:
oral examination
'after qualifying?' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'test for dentist before' is the wordplay.
'test' becomes 'examination' (synonyms).
'for' means one lot of letters go next to another (I've seen this in other clues).
'dentist before' becomes 'oral' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'examination' put after 'oral' is 'ORAL EXAMINATION'.
'and' is the link.
(Other definitions for oral examination that I've seen before include "Testing event for student" , "looking down in the mouth?" , "Test" .)