Possible Clues:

• Flush top off cultivated animal's home
• Made to feel embarrassed in revolutionary hang out
• King Edward periodically doesn't flush
• Flush endless swirl in unfinished burst
• Flush wine cave
• Begin to look embarrassed by communist cell
• Become rosy, as cheeks
• Betray embarrassment
• Display bashfulness
• 'When We Were Very Young' author, 1924