Vague about Indian city plan (7)
I believe the answer is:
diagram
'plan' is the definition.
(I've seen this before)
'vague about indian city' is the wordplay.
'vague' becomes 'dim' (I've seen this before).
'about' means one lot of letters goes inside another.
'indian city' becomes 'agra' (city in India).
'dim' going around 'agra' is 'DIAGRAM'.
(Other definitions for diagram that I've seen before include "Simple schematic" , "Simplified drawing" , "Sketch - plan" , "picture" , "A grid, Ma? (Anag)" .)