Doctor, I have get up and go! (5)
I believe the answer is:
drive
'go' is the definition.
(I know that drive is a more specific form of the action go)
'doctor i have' is the wordplay.
'doctor' becomes 'Dr' (abbreviation).
'i have' becomes 'ive' (contraction of 'I have').
'dr'+'ive'='DRIVE'
'get up and' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for drive that I've seen before include "Propel; outing" , "tenacity" , "sustained military assault" , "Pilot a 4x4" , "Diver (anag.)" .)