Clarity after moving the held. Will take a double move to the leg, attempt to grab the leg as part of the move and start climbing the tree.
Spoiler: Climb the Ranks(1d20+7) For the climb check, if this entire action has to take multiple rounds to accomplish I will of course bow to the rule. However if it can all be done and requires more rolls just let me know.
If Clarity falters on the way up she will immediately cast the spell 'Grasp' as an immediate action.