Possible Clues:

• Shrub bright in autumn
• Leaves and shoots of this tree are used in dyeing
• Tree so great shelters the old woman
• Dried ground leaves of this tree are used for tanning and dyeing
• As much (anag.)
• Shrub of the type mum can hide in
• Clever chap, to hide in so great a tree
• Hard homme de lettres climbing a tree
• This is a chum's tree, strangely
• As much (anag) - tree