Revolting individual's parting call (6)
I believe the answer is:
rising
'revolting' is the definition.
(rising up)
'individual's parting call' is the wordplay.
'individual's' becomes 'i's' (Roman numeral for one).
'parting' indicates putting letters inside.
'call' becomes 'ring' (telephone call).
'is' going into 'ring' is 'RISING'.
(Other definitions for rising that I've seen before include "Armed revolt against authority" , "Ascension" , "Upwardly mobile" , "Upward rebellion?" , "Insurrection" .)