Rural youngster kept up with stomach trouble and shared cold (7)
I believe the answer is:
bucolic
'rural' is the definition.
(similar in meaning)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for bucolic that I've seen before include "Of rural or pastoral life" , "Rustic - pastoral" , "Agrarian" , "Relating to rural life" , "Characteristic of country life" .)