Satisfactory to correspond with Bill (8)
I believe the answer is:
adequate
'satisfactory' is the definition.
('adequate' is associated in meaning with 'satisfactory')
'correspond with bill' is the wordplay.
'correspond' becomes 'equate' ('equate' can be a synonym of 'correspond'**).
'with' says to put letters next to each other.
'bill' becomes 'ad' (advertisement stuck on wall).
'equate' put after 'ad' is 'ADEQUATE'.
'to' is the link.
(Other definitions for adequate that I've seen before include "Fair to middling" , "up to the job?" , "plenty" , "'Good enough, all right (8)'" , "Barely sufficient" .)