Lost, but I ... I am so wanting to get somewhere! (9)
I believe the answer is:
Here is my best explanation:
'wanting to get somewhere' is the definition.
'lost but i i am so' is the subsidiary indication.
'lost' is an anagram indicator.
'butiiamso' with letters rearranged gives 'ambitious'.
(Other definitions for ambitious that I've seen before include "Aspiring", "Intent on achievements", "Keen to succeed", "Desiring success", "Seeking success", "Having a strong desire for success", "Aspirant" and "Bold - pushy".)