Abandon medic before medical procedure (4)
I believe the answer is:
drop
'abandon' is the definition.
(I've seen this before)
'medic before medical procedure' is the wordplay.
'medic' becomes 'dr' (abbreviation for doctor).
'before' says to put letters next to each other.
'medical procedure' becomes 'op' (short for operation).
'dr'+'op'='DROP'
(Other definitions for drop that I've seen before include "Small bit - fall" , "Small drink" , "small amount of alcohol" , "to omit the > smallest amount" , "Finish with" .)