Girl 11 transported by Beethoven's 3rd (5)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

O (11a = OSCAR = O in the radio alphabet) contained in (transported by) ERICA (a girl’s name) would give EROICA (the title of Beethoven’s 3rd symphony). An awkwardly constructed clue: it would work better if “transported by” meant “removed from”, but I can’t really see that it does.