Doris, say, arguably more "out" before end of evening (7)
I believe the answer is:
lessing
This clue could be a double definition.
'doris' is the first definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'arguably more out before end of evening' is the second definition.
The definition suggests a singular noun which matches the answer.
'say' acts as a link.
Can you help me to learn more?
(Other definitions for lessing that I've seen before include "source of drama" , "Doris - - , novelist" , "Doris -, British author" , "Writer" .)