Crossword Genius

What may indicate way finale of chorus rises (4)

Ross

I believe the answer is:

sign

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'what may indicate' is the definition.
I can't tell whether this definition defines the answer.

'way finale of chorus rises' is the wordplay.
'way' becomes 'n' (Compass direction - North).
'finale of chorus' becomes 'gis' (I can't justify this - if you can you should believe this answer much more).
'rises' says the letters should be written backwards.
'n'+'gis'='ngis'
'ngis' back-to-front is 'SIGN'.

Can you help me to learn more?

(Other definitions for sign that I've seen before include "Any of the 12 divisions of the Zodiac" , "Ram" , "Communicate to the deaf" , "Indicator" , "Manifestation" .)

I've seen this clue in The Telegraph.
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