Saint in peace prepared to do runner (6)
I believe the answer is:
escape
'do runner' is the definition.
The definition and answer can be both plants as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'saint in peace prepared' is the wordplay.
'saint' becomes 's'.
'in' is an insertion indicator.
'prepared' indicates anagramming the letters.
'peace' with letters rearranged gives 'ecape'.
's' put inside 'ecape' is 'ESCAPE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for escape that I've seen before include "Run away from confinement" , "Decamp" , "Get free from captivity" , "bolt" , "issue" .)