Possible Clues:

• Siegfried poetically soldiers on after ring's brought back
• He devised cuts since accordingly introduced by young man
• Big name in hairstyling
• Siegfried —, English poet and novelist
• A fool entering shortly — Siegfried, perhaps
• Siegfried —, poet and writer
• Hairstyling icon Vidal
• Poet joining regiment shortly
• A writer, some soldiers, and so on
• Poet's old love choked by nerve gas