Possible Clues:

• Wood in Budweiser fermentation tanks
• Couple starting off bright and early, both caught short, needing tree!
• Trees for flooring
• Deciduous tree with smooth grey bark
• Walter --, American aviator and aviation entrepreneur (1891-1950)
• Tree with prickly burs
• Wood from shore area we hear
• Source of mast that's come ashore, we hear
• Nut-bearing hardwood
• Wood in shore area mentioned