Silver symbol right, a site of the Taj Mahal (4)
I believe the answer is:
agra
'site of the taj mahal' is the definition.
(I've seen this before)
'silver symbol right a' is the wordplay.
I cannot really see how this works, but
'silver' could be 'ag' (Ag is the chemical symbol for silver) and 'ag' is found within the answer.
'right' could be 'r' (common abbreviation) and 'r' is found within the answer.
'a' is within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for agra that I've seen before include "Taj Mahal's city" , "City famous for its Mogul architecture" , "mausoleum site" , "Home to the Taj Mahal" , "Foreign city" .)