Historic master traitor? (5)
I believe the answer is:
marat
'historic master traitor?' is the definition.
The definition suggests a singular noun which matches the answer.
'master traitor?' is the wordplay.
'master' becomes 'ma' (Master of Arts).
'traitor?' becomes 'rat' (rat can mean a treacherous person).
'ma'+'rat'='MARAT'
Can you help me to learn more?
(Other definitions for marat that I've seen before include "Jean Paul, French revolutionary, murdered in his bath" , "French revolutionary killed in his bath" , "murdered radical" , "French revolutionary politician" , "Charlotte Corday murdered him in his bath" .)