Doesn't show up the stink created by individual getting top-secret treatments (8)

'doesn't show up the stink created' is the definition.
I can't tell whether this defines the answer.

'individual getting top-secret treatments' is the wordplay.
'individual getting' becomes 'ob' (I can't justify this - if you can you should give a lot more credence to this answer).
'top' indicates taking the first letters.
'treatments' becomes 'cures' (cure is a kind of treatment).
The first letter of 'secret' is 's'.
'ob'+'s'+'cures'='OBSCURES'

'by' acts as a link.

Can you help me to learn more?