Maybe lead roof's missing -- and the rest (2,2)
I believe the answer is:
et al
'and the rest' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for et al that I've seen before include "Latin abbreviation meaning 'and others'" , "Latin notation - late for others" , "And the rest (Lat. abbr.)" , "Latin notation meaning and others" , "'And others, to the old Romans (2,2)'" .)