Fill beyond capacity (4)
'fill beyond capacity' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for satiate that I've seen before include "stuff" , "Overfill - gorge" , "content" , "gladden a gourmand" , "Completely satisfy" .)
(Other definitions for sate that I've seen before include "Overfill, gorge" , "replete" , "Malaysian dish" , "Satisfy to excess" , "Satisfy - surfeit" .)