Bores medic with misfortunes (6)
I believe the answer is:
drills
'bores' is the definition.
(I've seen this before)
'medic with misfortunes' is the wordplay.
'medic' becomes 'dr' (doctor).
'with' says to put letters next to each other.
'misfortunes' becomes 'ills' (ill is a kind of misfortune).
'dr'+'ills'='DRILLS'
(Other definitions for drills that I've seen before include "monkeys" , "Boring tools" , "Teaches by repetition" , "Tools with a sharp points for making holes" , "Bores in army exercises" .)