Other things develop late (2,2)
I believe the answer is:
et al
'other things' is the definition.
The definition suggests a singular noun which matches the answer.
'develop late' is the wordplay.
'develop' indicates an anagram.
'late' is an anagram of 'ET AL'.
Can you help me to learn more?
(Other definitions for et al that I've seen before include "'And others, to the old Romans (2,2)'" , "And the rest (Lat. abbr.)" , "And others (abbrev.)" , "And the rest, to the old Romans" , "Latin notation meaning and others" .)