Crossword Genius

A nameless germ spreading disease (6,7)

Ross

I believe the answer is:

german measles

'disease' is the definition.
(German measles is an example)

'a nameless germ spreading' is the wordplay.
'spreading' is an anagram indicator.
'a'+'nameless'+'germ'='anamelessgerm'
'anamelessgerm' anagrammed gives 'GERMAN MEASLES'.

(Other definitions for german measles that I've seen before include "complaint" , "Rubella" , "viral illness" .)

I've seen this clue in The Telegraph.
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