Swing back and forth
'swing back and forth' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for oscillate that I've seen before include "Swing back and forth" , "Waver between various options" , "change sides" , "sway" , "Swing to and fro with lost Alice" .)
'swing back and forth' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sway that I've seen before include "Rock, stagger" , "Swing from side to side, or influence opinion" , "Strong influence" , "Pitch sideways" , "Vacillate" .)