Is part of the inner circle of Easter 1916 (6)
I believe the answer is:
rising
'easter 1916' is the definition.
I can't judge whether this defines the answer.
'is part of the inner circle' is the wordplay.
'part of' is an insertion indicator (part of the inside).
'the inner circle' becomes 'ring' ('ring' can be a synonym of 'circle'. I am not sure about the 'inner' bit.**).
'is' placed within 'ring' is 'RISING'.
'of' is the link.
Can you help me to learn more?
(Other definitions for rising that I've seen before include "Approaching the age of" , "Ascension" , "In the ascendant" , "Sloping up; rebellion" , "Armed revolt against authority" .)