Is among the last of the children to have rebelled (5)
I believe the answer is:
risen
'rebelled' is the definition.
('rise' can be a synonym of 'rebel')
'is among the last of the children to have' is the wordplay.
'among' is an insertion indicator (inserted letters are placed among others).
'the last of' says to take the final letters.
'to' means one lot of letters go next to another (I've seen this in other clues).
'have' becomes 're' (I can't explain this - if you can you should believe this answer much more).
The last letter of 'children' is 'n'.
'n' after 're' is 'ren'.
'is' placed inside 'ren' is 'RISEN'.
Can you help me to learn more?
(Other definitions for risen that I've seen before include "Proved" , "(Of sun) up" , "Increased" , "(Having) come up" , "Above the horizon" .)