Harass Medical Officer in case (6)
I believe the answer is:
molest
'harass' is the definition.
(I've seen this before)
'medical officer in case' is the wordplay.
'medical officer' becomes 'mo' (this could be a standard abbreviation of which I'm unaware).
'in case' becomes 'lest' (I've seen this before).
'mo'+'lest'='MOLEST'
Can you help me to learn more?
(Other definitions for molest that I've seen before include "abuse" , "Assault hostilely" , "Handle roughly, torment" , "Maliciously interfere with" , "Paw" .)