German leader made fortune with rollback (10)
I believe the answer is:
chancellor
'german leader' is the definition.
(term for the head of the German government)
'fortune with rollback' is the wordplay.
'fortune' becomes 'chance' (synonyms).
'with' means one lot of letters go next to another.
'rollback' becomes 'llor' (I can't explain this - if you can you should believe this answer much more).
'chance'+'llor'='CHANCELLOR'
'made' acts as a link.
Can you help me to learn more?
(Other definitions for chancellor that I've seen before include "Govt. finance minister" , "Head of state" , "See 8" , "Government leader" , "chief minister" .)