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 tell whether this definition defines the answer.
'in the end disbelieving kids you' is the wordplay.
'in' is an insertion indicator.
'the end' suggests the final letters.
'you' becomes 'lasse' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
The last letters of 'disbelieving kids' are 'gs'.
'gs' going 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" .)