Plan suggested by Neil? (7)
I believe the answer is:
outline
'plan' is the definition.
(outline is a kind of plan)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for outline that I've seen before include "Preliminary plan or summary of main points" , "Sketch; summarise" , "Give a rough idea" , "Sketchy plan" , "Plan with little detail" .)