No great lecturer getting request to repeat something (6)
I believe the answer is:
pardon
'request to repeat something' is the definition.
I can't judge whether this definition defines the answer.
'no great lecturer getting' is the wordplay.
'no great' becomes 'par' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'lecturer' becomes 'don' (don can mean an academic).
'getting' means one lot of letters go next to another.
'par'+'don'='PARDON'
Can you help me to learn more?
(Other definitions for pardon that I've seen before include "Polite expression of regret, please excuse" , "Forgive or excuse (an offence)" , "Forgive; come again?" , "Forgiveness - I beg yours" , "Grant forgiveness" .)