Possible Clues:

• Extension overlooking army unit is furthest from the centre
• From the brook, by the sound of it, at the end
• Last text remembered to an extent
• Inordinate
• The Mex gets the tree right at the end
• Point furthest away
• Nothing moderate about me at last
• Highest and sheer
• Uncompromising at outer limit
• Pin removed in dangerous experiment -- the result is most violent