Darn stocking following plan (5)
I believe the answer is:
draft
'plan' is the definition.
(I know that draft is a more specific form of plan)
'darn stocking following' is the wordplay.
'darn' becomes 'drat' (both are mild expletives).
'stocking' is an insertion indicator ('stock' can mean 'carry' or 'contain').
'following' becomes 'f' (used when citing page numbers etc).
'drat' going around 'f' is 'DRAFT'.
(Other definitions for draft that I've seen before include "Sketch; money order" , "Formulate" , "sketch, perhaps" , "Draw an outline" , "form of conscription" .)