Man with stapler assembled comprehensive document (6,4)
I believe the answer is:
master plan
'comprehensive document' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'man with stapler assembled' is the wordplay.
'with' means one lot of letters goes inside another.
'assembled' indicates anagramming the letters.
'stapler' with letters rearranged gives 'sterpla'.
'man' placed around 'sterpla' is 'MASTER PLAN'.
Can you help me to learn more?
(Other definitions for master plan that I've seen before include "Overall strategy" , "Great stratagem" .)