Make a secret plan (4)
I believe the answer is:
plot
(Other definitions for plot that I've seen before include "Contrive" , "are intriguing" , "lost in poor judgment" , "Vegetable garden - scheme" , "Mark position" .)
I believe the answer is:
plot
(Other definitions for plot that I've seen before include "Contrive" , "are intriguing" , "lost in poor judgment" , "Vegetable garden - scheme" , "Mark position" .)