In good health, suitable (3)
I believe the answer is:
fit
This clue is a double definition.
'in good health' is the first definition.
(I've seen this before)
'suitable' is the second definition.
(similar in meaning)
(Other definitions for fit that I've seen before include "Ready" , "Suitable; healthy" , "In trim" , "Healthy - episode of epilepsy" , "'Sudden attack, of coughing say (3)'" .)