Wrong to restrict core of something remembered for all time (8)
I believe the answer is:
immortal
'remembered for all time' is the definition.
(I've seen this in another clue)
'wrong to restrict core of' is the wordplay.
'wrong' becomes 'immoral' (similar in meaning).
'to restrict' means one lot of letters goes inside another (inserted letters are restricted or trapped).
'core of' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'immoral' going around 't' is 'IMMORTAL'.
'something' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for immortal that I've seen before include "Never dying" , "Moral Tim (anag.)" , "Living forever" , "Great person" , "Living for ever" .)