Bill's old trouble (3)
I believe the answer is:
ado
'trouble' is the definition.
(both can mean bother or commotion)
'bill's old' is the wordplay.
'bill' becomes 'ad' (advertisement stuck on wall).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'ad'+'o'='ADO'
(Other definitions for ado that I've seen before include "Flurry" , "Pother" , "stir" , "puff ball!" , "'Much ... About Nothing, Shakespeare play (3)'" .)