In the end, disbelieving kids – you can see right through them (7)
I believe the answer is:
glasses
'see right through them' is the definition.
I can't judge whether this defines the answer.
'in the end disbelieving kids you' is the wordplay.
'in' indicates putting letters inside.
'the end' says to take the final letters.
'you' becomes 'lasse' (I can't explain this - if you can you should give a lot more credence to this answer).
The last letters of 'disbelieving kids' are 'gs'.
'gs' placed around 'lasse' is 'GLASSES'.
'can' acts as a link.
Can you help me to learn more?
(Other definitions for glasses that I've seen before include "Specs" , "Spectacles and receptacles" , "Spectacles; schooners" , "Small refracting telescopes" , "They make girls unattractive to Parker" .)