Blank space around a text (6)
I believe the answer is:
margin
'blank space around a text' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for margin that I've seen before include "Permissible difference" , "Edge or space for error" , "Bland space around text" , "Edge; room for error" , "Edge, border, fringe" .)