Spot to jot (7)
(Other definitions for notepad that I've seen before include "Tablet" , "Jotter; pocket computer" , "Place for recording" , "scribbler" , "Block of writing paper; computer" .)
'spot to jot' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for pad that I've seen before include "Walk with soft steady steps" , "Piece of soft material or bachelor's flat" , "Absorbent material" , "Helicopter landing area" , "Floating leaf of a lily" .)
(Other definitions for margin that I've seen before include "Edge or space for error" , "Boundary line or the area" , "Permissible difference" , "Edge; room for error" , "Edge, border, fringe" .)