Fight doctor in outdoor wear (6)
I believe the answer is:
combat
'fight' is the definition.
(I know that fight can be written as combat)
'doctor in outdoor wear' is the wordplay.
'doctor' becomes 'MB' (Bachelor of Medicine, Medicinae Baccalaureus).
'in' means one lot of letters goes inside another.
'outdoor wear' becomes 'coat' (coat is a kind of wear. I am not sure about the 'outdoor' bit.).
'mb' going within 'coat' is 'COMBAT'.
Can you help me to learn more?
(Other definitions for combat that I've seen before include "Battle, warfare" , "type of jacket" , "sort of jacket" , "Armed fighting" , "Fight against; fighting" .)