Give up in Split during inevitable outbreak of revolution (9)
I believe the answer is:
Here is my best explanation:
'give up' is the definition.
('surrender' can be a synonym of 'give up')
'split during inevitable outbreak of revolution' is the subsidiary indication.
'split' becomes 'rend' (I've seen this in other clues**).
'during' is an insertion indicator.
'inevitable' becomes 'sure' ('sure' can be similar in meaning to 'inevitable').
'outbreak of' suggests taking the first letters.
The first letter of 'revolution' is 'r'.
'rend' going into 'sure' is 'surrende'.
'in' is the link.
(Other definitions for surrender that I've seen before include "Give in", "Cede", "Capitulate, relinquish", "Wave the white flag", "Hand over", "capitulation", "Yield to the control of another", "Yield - release", "Concede" and "Capitulation".)