In other words, turn the table on the speaker (6)
I believe the answer is:
orator
'the speaker' is the definition.
(orator is a kind of speaker)
'in other words turn the table' is the wordplay.
'in other words' becomes 'or' (I've seen this in other clues).
'turn the table' becomes 'ator' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'or'+'ator'='ORATOR'
'on' acts as a link.
Can you help me to learn more?
(Other definitions for orator that I've seen before include "One addressing" , "To roar at a speech-maker" , "One making one across" , "One who holds forth" , "Eloquent public speaker" .)