Lost, but I ... I am so wanting to get somewhere! (9)
I believe the answer is:
ambitious
'wanting to get somewhere' is the definition.
'lost but i i am so' is the wordplay.
'lost' indicates anagramming the letters.
'but'+'i'+'i'+'am'+'so'='butiiamso'
'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" .)