Crossword Genius

Germs seen to be spread by a carrier (9)

Ross

I believe the answer is:

messenger

'a carrier' is the definition.
(thesaurus)

'germs seen to be spread' is the wordplay.
'to be spread' indicates anagramming the letters.
'germs'+'seen'='germsseen'
'germsseen' is an anagram of 'MESSENGER'.

'by' acts as a link.

(Other definitions for messenger that I've seen before include "Runner" , "Bearer of communication" , "Communication carrier" , "The role of Hermes or Mercury?" , "One who bears a communication" .)

I've seen this clue in The Globe and Mail.
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