Aim to work up to compromise (8)
I believe the answer is:
endanger
'to compromise' is the definition.
('endanger' can be a synonym of 'compromise')
'aim to work up' is the wordplay.
'aim' becomes 'end' (both can mean a goal or purpose).
'to work up' becomes 'anger' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'end'+'anger'='ENDANGER'
Can you help me to learn more?
(Other definitions for endanger that I've seen before include "Put in harm's way" , "Jeopardize" , "Hazard" , "Expose to injury or extinction" , "Put in peril" .)