Crossword Genius

Swiss legend possibly revealing secrets (8)

Ross

I believe the answer is:

telltale

I'm a little stuck... Click here to teach me more about this clue!

'revealing secrets' is the definition.
'telltale' can be an answer for 'revealing' (I've seen this before). I am not sure about the 'secrets' bit.

'swiss legend' is the wordplay.
'swiss' becomes 'tell' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'legend' becomes 'tale' (I've seen this in other clues).
'tell'+'tale'='TELLTALE'

'possibly' acts as a link.

Can you help me to learn more?

(Other definitions for telltale that I've seen before include "Revealer of secrets" , "Betraying" , "Revealing or indicating something, like blabbermouth" , "Person who blabs or something that reveals" , "Revealing indicator or sneak" .)

I've seen this clue in The Sun.
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