Way out for Bill inside fooling around (8)
I believe the answer is:
escapade
'way out' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'bill inside fooling around' is the wordplay.
'bill' becomes 'ad' (advertisement stuck on wall).
'inside' is an insertion indicator.
'fooling around' becomes 'escape' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'ad' placed inside 'escape' is 'ESCAPADE'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for escapade that I've seen before include "Risky adventure" , "Daring adventure" , "Madcap adventure" , "Risky lark" , "Antic" .)