Disease caused by vitamin c deficiency (6)
I believe the answer is:
scurvy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disease caused by vitamin c deficiency</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for scurvy that I've seen before include "Whoreson" , "Disease - epithet for knave" , "(Of a knave) contemptible!" , "Disease from lack of vitamin C - or dishonourable as knave may be" , "Condition caused by lack of vitamin C" .)