Indian city captured in poorly lit picture (7)
I believe the answer is:
diagram
'picture' is the definition.
(I know that picture can be written as diagram)
'indian city captured in poorly lit' is the wordplay.
'indian city' becomes 'agra' (I've seen this before).
'captured in' indicates putting letters inside.
'poorly lit' becomes 'dim' (I've seen this before).
'agra' inserted inside 'dim' is 'DIAGRAM'.
(Other definitions for diagram that I've seen before include "Simplified representation" , "Explatory drawing" , "Outline drawing showing parts or workings" , "Schematic representation" , "Explanatory illustration" .)