Celebrity using half of capital touring India (4)
I believe the answer is:
lion
'celebrity' is the definition.
(both can mean a celebrated person)
'half of capital touring india' is the wordplay.
'half of capital' becomes 'lon' (half of 'London').
'touring' indicates putting letters inside (touring can mean going round).
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'lon' enclosing 'i' is 'LION'.
'using' is the link.
(Other definitions for lion that I've seen before include "Important figure" , "Courageous person" , "Cat, the king of the beasts" , "Animal which Judah is described as" , "Carnivorous 6" .)