Illness? One must get up minimally, obeying instructions (9)
I believe the answer is:
compliant
'obeying instructions' is the definition.
(complying with instructions)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for compliant that I've seen before include "Obliging" , "Submissive, acquiescent" , "Subservient" , "Complaint about being obedient" , "Yielding to pressure" .)