Little pharaoh gets nothing right according to teacher (5)
I believe the answer is:
tutor
'to teacher' is the definition.
(tutor is a kind of teacher)
'little pharaoh gets nothing right' is the wordplay.
'little pharaoh' becomes 'tut' (colloquial name for Tutankhamun. I am not sure about the 'little' bit.).
'gets' is a charade indicator (letters next to each other).
'nothing' becomes 'O' (O resembles 0).
'right' becomes 'r' (common abbreviation).
'tut'+'o'+'r'='TUTOR'
'according' is the link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for tutor that I've seen before include "Give individual instruction" , "trainer" , "college teacher" , "Edify" , "Coach, teacher" .)