Crossword Genius

Busy ring road before ultimately arriving at border (3,6)

Ross

I believe the answer is:

rio grande

'border' is the definition.
(part of the US-Mexico border)

'busy ring road before ultimately' is the wordplay.
'busy' indicates anagramming the letters.
'ultimately' suggests the final letters.
The last letter of 'before' is 'e'.
'ring'+'road'='ringroad'
'ringroad' anagrammed gives 'riogrand'.
'riogrand'+'e'='RIO GRANDE'

'arriving at' is the link.

(Other definitions for rio grande that I've seen before include "US/Mexican border river" , "banker" , "American flower" , "Waterway rising in Colorado" , "Long river" .)

I've seen this clue in The Telegraph.
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