Oscar and Arnold Rock from American city (7)
I believe the answer is:
orlando
'american city' is the definition.
'orlando' can be an answer for 'city' (I've seen this before). I'm unsure of the 'american' bit.
'oscar and arnold rock' is the wordplay.
'oscar' becomes 'o' (phonetic alphabet: alpha, bravo, charlie etc.**).
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
'rock' is an anagram indicator.
'arnold' anagrammed gives 'orland'.
'o' put after 'orland' is 'ORLANDO'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for orlando that I've seen before include "Florida resort -- Virginia Woolf novel" , "Florida location" , "V. Woolf novel" , "Disney World location" , "___ Gibbons, English composer of madrigals - Florida resort city" .)