X hit back (4)
I believe the answer is:
golf
This might be a double definition.
'x hit' is the first definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'back' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for golf that I've seen before include "Game involving woods and irons" , "Game with 18 holes" , "Game; G (radio comms.)" , "Outdoor game" , "The game some say spoils a good walk" .)