Crossword Genius

Trustworthy channel (5)

Ross

I believe the answer is:

sound

I believe this clue is a double definition.

'trustworthy' is the first definition.
(thesaurus)

'channel' is the second definition.
(I know that sound is a type of channel)

(Other definitions for sound that I've seen before include "Safe" , "Ocean inlet or deep bay" , "Financially stable" , "Health - noise" , "well" .)

I've seen this clue in The Independent.
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