Disgraceful complaint (6)
I believe the answer is:
scurvy
This clue might be a double definition.
'disgraceful' is the first definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
'complaint' is the second definition.
(scurvy is a kind of health problem)
Can you help me to learn more?
(Other definitions for scurvy that I've seen before include "Condition caused by lack of vitamin C" , "Disease caused by lack of vitamin C" , "(Of knaves) despicable" , "Condition caused by a deficiency of vitamin C" , "(Of a knave) contemptible!" .)