To the likes of Billy Bunter, it was an imposition! (5)

'billy bunter it was an imposition' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'to the likes of' is the wordplay.
I cannot quite understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'of' could be 'o' and 'o' is found within the answer.
The remaining letters 'imp' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?