Push aside cakes, passed to the left (4)
I believe the answer is:
snub
'left' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for snub that I've seen before include "Act of rudeness" , "Rebuff, spurn" , "Insult; blunt (nose)" , "Ignore, spurn disdainfully" , "Cut; ignore" .)