Plan day with female cutting grass (5)
I believe the answer is:
draft
'plan' is the definition.
(I know that draft is a more specific form of plan)
'day with female cutting grass' is the wordplay.
'day' becomes 'd' (abbreviation for day).
'with' means one lot of letters go next to another.
'female' becomes 'f' (abbreviation).
'cutting' indicates putting letters inside (some letters cut their way into a word).
'grass' becomes 'rat' (both can mean a snitch or informer).
'f' placed into 'rat' is 'raft'.
'd'+'raft'='DRAFT'
(Other definitions for draft that I've seen before include "Formulate" , "book's outline" , "Early version of text" , "plan outlined" , "select group" .)