Possible Clues:

• Kind of harp that's a wind instrument
• A windy way for the nail to turn up at last
• Russell got nothing to nail this up with, but wind
• If the wind gets up for it, one must nail it up at last
• Russell got nothing from the nail up but got the wind up
• Get the wind up to having to harp on this
• -- harp (instrument 'played' by the wind)
• and 9 Across: Hear pianola playing or some other instrument
• Type of harp that sounds when a current of air passes through it
• Eternity with piercing pain arising due to wind