Crossword Genius

It shows the way to finish correspondence (8)

Ross

I believe the answer is:

signpost

'it shows the way' is the definition.
(I've seen this before)

'finish correspondence' is the wordplay.
'finish' becomes 'sign' (as in to finish a letter by signing it).
'correspondence' becomes 'post' (letters in the post).
'sign'+'post'='SIGNPOST'

'to' is the link.

(Other definitions for signpost that I've seen before include "Direction pointer" , "this will give you directions" , "pointer along the way" , "One may help you on your way" , "Guide, indicator" .)

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