Support tyre when cycling around India, showing decency (9)
I believe the answer is:
propriety
'decency' is the definition.
(thesaurus)
'support tyre when cycling around india' is the wordplay.
'support' becomes 'prop' (prop up can mean to support).
'when cycling' indicates anagramming the letters (letters are rotated).
'around' means one lot of letters goes inside another.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'tyre' anagrammed gives 'rety'.
'rety' enclosing 'i' is 'riety'.
'prop'+'riety'='PROPRIETY'
'showing' is the link.
(Other definitions for propriety that I've seen before include "Moral acceptability" , "Correct behaviour" , "Correctness of behaviour" , "Decorum" .)