Activist comparatively unprepared touring South Africa (8)
I believe the answer is:
crusader
'activist' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'comparatively unprepared touring south africa' is the wordplay.
'comparatively unprepared' becomes 'cruder' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'touring' means one lot of letters goes inside another (touring can mean going round).
'south africa' becomes 'sa' (abbreviation).
'cruder' placed around 'sa' is 'CRUSADER'.
Can you help me to learn more?
(Other definitions for crusader that I've seen before include "Campaigner for a cause, like Richard the Lionheart" , "For example, Richard I" , "Earnest campaigner" , "religious warrior" , "One campaigning vigorously" .)