Be the more usual to succeed (7)
I believe the answer is:
prevail
'succeed' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for prevail that I've seen before include "Triumph, overcome" , "Gain mastery" , "come out on top" , "Get one's way" , "Succeed ultimately" .)