Call for a rise (8)
I believe the answer is:
reveille
'call' is the definition.
(I have seen 'Early call' mean 'reveille' so perhaps 'call' could also mean 'reveille')
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for reveille that I've seen before include "Morning call" , "Soldiers' wakening call" , "The wake-up army bugle call" , "Army waking signal" , "Military waking signal" .)