Begin second cake (5)
I believe the answer is:
start
This clue might be a double definition.
'begin' is the first definition.
(I know that begin can be written as start)
'second cake' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I don't see?
Can you help me to learn more?
(Other definitions for start that I've seen before include "Begin with sudden movement of surprise" , "Begin - jump" , "Take the first step" , "begin an argument?" , "Begin - opening move" .)