Cut off, beheaded, Chancellor canonised from now on (8)
I believe the answer is:
evermore
'canonised from now on' is the definition.
I can't tell whether this defines the answer.
'cut off beheaded chancellor' is the wordplay.
'cut off' becomes 'sever' (to sever is to cut).
'beheaded' means to remove the first letter (the head of the word is removed).
'chancellor' becomes 'more' (I can't explain this - if you can you should believe this answer much more).
'sever' with its initial letter taken away is 'ever'.
'ever'+'more'='EVERMORE'
Can you help me to learn more?
(Other definitions for evermore that I've seen before include "(For) perpetuity" , "Always, forever" , "To all eternity" , "unceasingly" , "For which, permanently" .)