Possible Clues:

• In your cap, it's an accomplishment
• Quite an achievement for a woman - it could tickle you!
• Exploit by brave man cut down as a trifling thing
• Rotate (propeller) blades (to reduce thrust)
• Feel afraid to hold the plume
• Part of covering of bird
• The fear (anag) - type of bed
• Prov. light part of bird
• Quite an achievement for her to make so light of it
• A white one denotes cowardice