Heroism going wrong amid unexpected uprising (7-2)
I believe the answer is:
derring-do
'heroism going' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's a link between them I don't understand?
'wrong amid unexpected uprising' is the wordplay.
'wrong' becomes 'erring' (doing wrong).
'amid' means one lot of letters goes inside another.
'unexpected' becomes 'odd' (odd can mean unexpected or unusual).
'uprising' is a reversal indicator.
'odd' backwards is 'ddo'.
'erring' inserted inside 'ddo' is 'DERRING-DO'.
Can you help me to learn more?
(Other definitions for derring-do that I've seen before include "Daring deeds" , "Literary word for heroic courage or action" , "'bold action'" , "Swashbuckling boldness" , "heroic deeds" .)