Possible Clues:

• Having one flat, musically
• Like Brahms's Symphony No. 3
• With one flat, musically
• Vb. form
• Gershwin's ''Concerto __''
• Like Beethoven's Symphony No. 8
• Gershwin's 'Concerto ___'
• Like Beethoven's "Pastoral Symphony"
• Gershwin's 'Concerto --'
• GIs on foot