Possible Clues:

• Two hacks, perhaps, will do for this tree!
• Tree has, say, grey fruit around trunk
• The sour stench put out by this inedible fruit
• Would from this, by the sound of it, be the stale old stable joke?
• Tree with sticky buds
• Could one be felled like a log by punch to body and head?
• Animal, a particular colour, whose shade may be seen in park
• Is that the old, wooden, stable joke?
• Conquer the sound of a seedy switch of 9 down
• Two hacks seen in the woods