Airman’s plan to tour India (5)
I believe the answer is:
pilot
'airman's' is the definition.
(I've seen this before)
'plan to tour india' is the wordplay.
'plan' becomes 'plot' (plotting is a kind of planning).
'to tour' means one lot of letters goes inside another (to tour can mean to go around).
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'plot' enclosing 'i' is 'PILOT'.
(Other definitions for pilot that I've seen before include "Steer, test (scheme)" , "Navigate" , "Small flame that ignites a gas boiler" , "Airman" , "-- Whale; -- light" .)