Consulting advert on screen, terminal in library (8)
I believe the answer is:
advisory
'terminal in library' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'consulting advert on screen' is the wordplay.
'consulting advert' becomes 'ady' (I can't justify this - if you can you should believe this answer much more).
'on' is an insertion indicator (as in clothing \'on\' a person).
'screen' becomes 'visor' (I've seen this before).
'ady' going around 'visor' is 'ADVISORY'.
Can you help me to learn more?
(Other definitions for advisory that I've seen before include "Recommended but not compulsory" , "helping" , "Recommending" , "Making recommendations" .)