Shoot advertisement (4)
I believe the answer is:
plug
I believe this is a double definition.
'shoot' is the first definition.
(I've seen this before)
'advertisement' is the second definition.
(I've seen this before)
(Other definitions for plug that I've seen before include "Cork" , "It fits into electric socket" , "See 19" , "Bung -- promotion" , "Good word" .)