German measles (7)
I believe the answer is:
rubella
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">german measles</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rubella that I've seen before include "German measles" , "complaint" , "contagious disease" , "infection" .)