Bill has little time for paperwork (5)
I believe the answer is:
admin
'paperwork' is the definition.
(administrative work)
'bill has little time' is the wordplay.
'bill' becomes 'ad' (advertisement stuck on wall).
'has' says to put letters next to each other.
'little time' becomes 'min' (short for minute).
'ad'+'min'='ADMIN'
'for' acts as a link.
(Other definitions for admin that I've seen before include "Management function" , "Business organisers" , "routine business" , "those running the show" , "Business management" .)