Doctor has year with a French practice (3,3)
I believe the answer is:
dry run
'practice' is the definition.
(dry run is a kind of practice)
'doctor has year with a french' is the wordplay.
'doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor'**).
'has' is a charade indicator (letters next to each other).
'year' becomes 'yr' (abbreviation).
'with' is a charade indicator (letters next to each other).
'a french' becomes 'un' ('a' in French).
'dr'+'yr'+'un'='DRY RUN'
(Other definitions for dry run that I've seen before include "A dummy test - sounds thirsty" , "Thirsty sort of rehearsal?" , "Arid trot as kind of rehearsal" , "Practice session, rehearsal" , "Procedure rehearsal" .)