Mastermind in part of family touring India (6)
I believe the answer is:
genius
'mastermind' is the definition.
(I know that mastermind can be written as genius)
'part of family touring india' is the wordplay.
'part of family' becomes 'genus' (biological taxonomy).
'touring' indicates putting letters inside (touring can mean going round).
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'genus' enclosing 'i' is 'GENIUS'.
'in' acts as a link.
(Other definitions for genius that I've seen before include "no dope" , "faculty" , "Maestro" , "Person with extraordinary ability" , "One has an extraordinary talent" .)