Endless talk from a gent going over overly nuanced leaders in The Guardian (8)
I believe the answer is:
chaperon
'guardian' is the definition.
(chaperon is a kind of guardian)
'endless talk from a gent going' is the wordplay.
'endless' means to remove the last letter.
'talk' becomes 'chat' (I've seen this before).
'from' is a charade indicator (letters next to each other).
'a gent going' becomes 'peron' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'chat' with its last letter removed is 'cha'.
'cha'+'peron'='CHAPERON'
'over overly nuanced leaders in the' acts as a link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for chaperon that I've seen before include "Duenna; look after" , "Preach on about older woman supervisor" , "Woman supervising girl" , "Person accompanying girl or younger group" , "One who accompanies and supervises" .)