Crossword Genius

Shake a little sign before treatise ends (7)

Ross

I believe the answer is:

librate

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'shake' is the definition.
(thesaurus)

'a little sign before treatise ends' is the wordplay.
'a little sign' becomes 'libra' (sign of the zodiac. I am not sure about the 'little' bit.).
'before' says to put letters next to each other.
'ends' suggests removing the centre.
'treatise' with its centre removed is 'te'.
'libra'+'te'='LIBRATE'

Can you help me to learn more?

(Another definition for librate that I've seen is " waver".)

I've seen this clue in the Sydney Morning Herald.
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