Notice rifle shot (5)
I believe the answer is:
flier
'notice' is the definition.
(both can mean a piece of advertising material)
'rifle shot' is the wordplay.
'shot' is an anagram indicator.
'rifle' anagrammed gives 'FLIER'.
(Other definitions for flier that I've seen before include "PO, for example" , "Leaflet for distribution" , "Good start" , "Circular" , "Advertising leaflet" .)