Crossword Genius

Oscillate like party briefly on speed (7)

Ross

I believe the answer is:

librate

'oscillate' is the definition.
(I know that librate is a type of oscillate)

'party briefly on speed' is the wordplay.
'party briefly' becomes 'lib' (abbreviation for Liberal, uk political party; 'briefly' suggests an abbreviation).
'on' says to put letters next to each other.
'speed' becomes 'rate' (the speed at which something happens).
'lib'+'rate'='LIBRATE'

'like' acts as a link.

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

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