Key to speak without a debate initially being guided (8)
I believe the answer is:
escorted
'being guided' is the definition.
(I've seen this in another clue)
'key to speak without a debate initially' is the wordplay.
'key' becomes 'esc' ('Escape' key on a computer keyboard).
'to speak' becomes 'orate' (orating is a kind of speaking).
'without' suggests deleting specific letters.
'debate initially' becomes 'd' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'orate' with 'a' removed is 'orte'.
'esc'+'orte'+'d'='ESCORTED'
Can you help me to learn more?
(Other definitions for escorted that I've seen before include "as bride comes up the aisle" , "Accompanied" .)