Notice wickedness of counsel (6)

I believe the answer is:

'counsel' is the definition.
(I've seen this before)

'notice wickedness' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'wickedness' becomes 'vice' (I've seen this before).
'ad'+'vice'='ADVICE'

'of' acts as a link.

(Other definitions for advice that I've seen before include "tip", "Warning - guidance", "Formal notice", "Admonition", "Supposedly wise words".)