This still warm near end of August? (5)
I believe the answer is:
night
'this still warm near end of august?' is the definition.
The definition and answer can be both related to time as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'near end of august?' is the wordplay.
'near' becomes 'nigh' (synonyms).
'end of' suggests the final letters.
The last letter of 'august' is 't'.
'nigh'+'t'='NIGHT'
Can you help me to learn more?
(Other definitions for night that I've seen before include "''Twas the ... before Christmas, when all through the house / Not a creature was stirring, not even a mouse''" , "Time between days" , "death" , "Sunset to sunrise" , "late" .)