### Clue: Long-suffering invalid practically propped up by vitamins (8)
### Answer: PATIENCE 
 ### Explanation: Definition: Long-suffering
 "patient"(one who receives medical attention and nursing care, an extreme case of which is an invalid) **minus**
**its last letter**(… practically) **placed above**(propped up by, in a down clue) C,E(two of the vitamin compounds).
Defn: As a noun.