Bouncer driven away by club? (4,4)
I believe the answer is:
golf ball
'club?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'bouncer driven away by' is the wordplay.
'bouncer' becomes 'ball' (something that bounces).
'driven away' becomes 'golf' (I can't justify this - if you can you should believe this answer much more).
'by' says to put letters next to each other.
'ball' after 'golf' is 'GOLF-BALL'.
(Other definitions for golf ball that I've seen before include "one must take on one's rounds" , "Pill" , "Links projectile" , "Object driven by club towards hole" , "It gets driven!" .)