Various birds on roof of edifice (7)
I believe the answer is:
diverse
'various' is the definition.
(I know that various can be written as diverse)
'birds on roof of edifice' is the wordplay.
'birds' becomes 'divers' (diver is a kind of bird).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'roof of edifice' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'divers'+'e'='DIVERSE'
Can you help me to learn more?
(Other definitions for diverse that I've seen before include "I served in many ways" , "Miscellaneous" , "Different and various" , "Disparate" , "Multifarious" .)