It follows getting shot in a pub (6)
I believe the answer is:
chaser
This might be a double definition.
'it follows' is the first definition.
The definition suggests a singular noun which matches the answer.
'shot in a pub' is the second definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'getting' is the link.
Can you help me to learn more?
(Other definitions for chaser that I've seen before include "A drink like beer after whisky" , "Beer after spirits e.g." , "One hunting" , "Drink of beer after spirit" , "Beer after whisky, say (or vice versa)" .)