Plotted (9)
There are a few possibilities for this:
conspired
'plotted' is the definition.
(I know that plotted can be written as planned)
This is all the clue.
(Other definitions for planned that I've seen before include "Prepared carefully in advance" , "Thought through in advance" , "Intended or designed" , "Decided beforehand" , "Arranged in advance" .)
'plotted' is the definition.
(scheming is a kind of plotting)
This is all the clue.
(Other definitions for schemed that I've seen before include "contrived" , "Intrigued" , "Secretly plotted" , "Devised plans" , "Cooked up" .)
'plotted' is the definition.
(conspiring is a kind of plotting)
This is the entire clue.
(Other definitions for conspired that I've seen before include "Intrigued" , "Plotted together" , "was intriguing" .)