Revolted, had left one's seat (5)
'revolted' is the definition.
(I've seen this before)
'left one's seat' is the wordplay.
I cannot really understand how this works, but
'one's' could be 'is' (Roman numeral) and 'is' is present in the answer.
The remaining letters 'ren' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'had' acts as a link.
Can you help me to learn more?
(Other definitions for risen that I've seen before include "mounted a rebellion" , "Grown up" , "(Having) come up" , "Moved up" , "Sprung up" .)
This clue is a double definition.
'revolted' is the first definition.
(I've seen this in another clue)
'left one's seat' is the second definition.
(I've seen this in another clue)
'had' is the link.
(Other definitions for arose that I've seen before include "Occurred; stood up" , "Happened" , "''. ... by any other name would smell as sweet'' (Romeo and Juliet)" , "Came about" , "stemmed" .)