Where all goes well, beetroot perhaps planted here? (6,5)
I believe the answer is:
purple patch
'where all goes well beetroot perhaps planted here?' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for purple patch that I've seen before include "A run of success" , "Passage of rich language" , "A run of good luck" , "growing variety of broccoli here?" , "Period of success, good fortune etc" .)