This writer against himself for the moment? (8)
I believe the answer is:
meantime
'the moment?' is the definition.
The answer and definition can be both related to time as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'this writer against himself' is the wordplay.
'this writer' becomes 'me' (the person who wrote the clues).
'against' becomes 'anti' (prefix meaning against).
'himself' becomes 'me' (I can't explain this - if you can you should believe this answer much more).
'me'+'anti'+'me'='MEANTIME'
'for' is the link.
Can you help me to learn more?
(Other definitions for meantime that I've seen before include "interval" , "interim?" , "For the moment" , "Intervening period" .)