He waved; I mistake problem and he does not approve (2,5,1,3,4)

I believe the answer is:

he takes a dim view

I'm a little stuck... Click here to teach me more about this clue!

'he does not approve' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'he waved i mistake problem' is the wordplay.
'problem' indicates anagramming the letters.
'waved'+'i'+'mistake'='wavedimistake'
'wavedimistake' is an anagram of 'takesadimview'.
'he'+'takesadimview'='HE TAKES A DIM VIEW'

'and' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.