Possible Clues:

• One monk from Japan and ten more - how wearing that becomes
• How wearing it gets when I am on in the knockout
• Loose dressing gown
• Girl will accept less dress
• Robe for girl with nothing on previously
• It literally means 'thing to wear'
• From Kipling? No, from Japan
• Oriental gown, a novel old number
• I'm wearing knockout little number, a long loose robe
• Monk, I suspect, has old dressing-gown