"And others," briefly (2,3)
(Other definitions for etal that I've seen before include "elsewhere" , "the rest" , "and others . . ." .)
'and others briefly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for et al that I've seen before include "And others (abbr)" , "and everyone else)" , "Latin notation meaning and others" , "along with others" , "... and other people (or things) (abbr)" .)