Curtains for Twitter - 7x7 🌕

Cryptic Mini #000000048: 

"Curtains for Twitter"

obscuration level: 🌕 (more like 😇)

This puzzle features a very special guest: the very first cryptic clue I ever wrote! I don't remember exactly when, but approx. 10-12 years ago, this little ditty popped into existence. I'm still quite proud of her, so I gave her the best seat at the table: 1-Across. Please give her a warm welcome! 😇