It's not obvious to me Miss (4,2,3)

'it's not obvious to me' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.

'miss' is the wordplay.
I cannot quite see how this works, but
'miss' could be 'fail' (failing is a kind of missing) and 'fail' is found in the answer.
The remaining letters 'tosee' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?