Army doctor has done with cut (5)
I believe the answer is:
drove
'army' is the definition.
(thesaurus)
'doctor has done with cut' is the wordplay.
'doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor').
'has' is a charade indicator (letters next to each other).
'done with' becomes 'over' (similar in meaning as in 'over and done with').
'cut' means to remove the last letter.
'over' with its last letter taken away is 'ove'.
'dr'+'ove'='DROVE'
(Other definitions for drove that I've seen before include "Flock of animals being driven" , "kicked hard" , "Flock being sent packing" , "Number of cattle" , "Moving crowd" .)