Stand up for better pay (4)
I believe the answer is:
rise
'stand up' is the definition.
(I know that stand up can be written as rise)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for rise that I've seen before include "Rebel" , "Pay increase" , "To swell (bread)" , "Move upward" , "Tower" .)