Brave revolutionary craving to capture northern base (8)
I believe the answer is:
cheyenne
'brave' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'revolutionary craving to capture northern base' is the wordplay.
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'craving' becomes 'yen' (I've seen this before).
'to capture' means one lot of letters goes inside another.
'northern' becomes 'n' (abbreviation e.g. N. Ireland).
'base' becomes 'e' (Euler's number - base of natural logarithms).
'yen' placed around 'n' is 'yenn'.
'che'+'yenn'+'e'='CHEYENNE'
Can you help me to learn more?
(Other definitions for cheyenne that I've seen before include "native language" , "American Indian" , "US state capital" , "tongue" , "N. American people; Wyoming city" .)