Cartographic close-up (5)
I believe the answer is:
inset
'cartographic close-up' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for inset that I've seen before include "Small piece inserted" , "Extra page or piece added to enlarge" , "Not taking proper care" , "Piece sewn into a garment" , "Magazine feature" .)