Late retrospective by the others in old Rome (2,2)
I believe the answer is:
et al
'the others in old rome' is the definition.
I can't judge whether this defines the answer.
'late retrospective' is the wordplay.
'retrospective' shows that the letters should be reversed in order.
'late' back-to-front is 'ET AL'.
'by' is the link.
Can you help me to learn more?
(Other definitions for et al that I've seen before include "And the rest (Lat. abbr.)" , "And others (abbr)" , "And others (abbrev.)" , "and everyone else)" , "... and other people (or things) (abbr)" .)