Travelling alone around India, by air in other words (6)
I believe the answer is:
eolian
'air in other words' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'travelling alone around india' is the wordplay.
'travelling' is an anagram indicator.
'around' is an insertion indicator.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'alone' with letters rearranged gives 'eolan'.
'eolan' enclosing 'i' is 'EOLIAN'.
'by' is the link.
Can you help me to learn more?
(Other definitions for eolian that I've seen before include "type of harp" , "Wind-borne (Amer.)" .)