Shadow Chancellor finally visiting Mumbai's content (5)
I believe the answer is:
umbra
'shadow' is the definition.
(I know that umbra is a type of shadow)
'chancellor finally visiting mumbai's content' is the wordplay.
'finally' says to take the final letters.
'visiting' means one lot of letters goes inside another.
'content' means to look at the middle letters.
The middle of 'mumbai' is 'umba'.
The last letter of 'chancellor' is 'r'.
'r' placed inside 'umba' is 'UMBRA'.
(Other definitions for umbra that I've seen before include "Shade, or ghost" , "Dark shadow cast by earth in eclipse" , "Area of total shadow" , "shady region" , "Burma (anag.)" .)