Several of the clues this week are associated with the old song "This old man, he played one, he played nick-nack on my thumb," etc. Thus, 3d - thumb; 1d - shoe; 5a - knee; 9a - door; 24a - this; 29a - nick-nack.
But... Still have 1 left. 23a P-T-R could be either Peter or Pater. Is it Sir Walter Scott??