Notice Green is back to see display (9)
I believe the answer is:
advertise
'display' is the definition.
(thesaurus)
'notice green is back to see' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'green' becomes 'vert' (heraldic term for green).
'back to' indicates one should take the final letters.
The final letter of 'see' is 'e'.
'ad'+'vert'+'is'+'e'='ADVERTISE'
(Other definitions for advertise that I've seen before include "Varied set (anag.)" , "Publicise, make known" , "Publicise, promote" , "Publicise, call attention to" , "Market" .)