American banker in Olympic city facing dreadful danger (3,6)
I believe the answer is:
rio grande
'american banker' is the definition.
'rio grande' can be an answer for 'banker' (I've seen this before). I'm not sure about the 'american' bit.
'olympic city facing dreadful danger' is the wordplay.
I cannot quite understand how this works, but
'city' could be 'rio' (Rio de Janeiro) and 'rio' is found in the answer.
an anagram of 'danger' is 'grande' which is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for rio grande that I've seen before include "Waterway rising in Colorado" , "US/Mexican border river" , "running water" , "River boundary between the US and Mexico" , "Long river" .)