Expands tour around South American range with sibling (8)

'expands tour' is the definition.
'broadens' can be an answer for 'expands' (broadening is a kind of expanding). I'm not certain of the 'tour' bit.

'around south american range with sibling' is the wordplay.
'around' says the letters should be written backwards.
'south' becomes 'S' (abbreviation).
'american range' becomes 'neda' (I am not sure about this - if you are sure you should believe this answer much more).
'with' says to put letters next to each other.
'sibling' becomes 'bro' (I've seen this before).
's'+'neda'='sneda'
'sneda' in reverse letter order is 'adens'.
'adens' after 'bro' is 'BROADENS'.

Can you help me to learn more?