Short story writer might ask about one (4)
I believe the answer is:
saki
'short story writer' is the definition.
(I've seen this before)
'might ask about one' is the wordplay.
'might' indicates an anagram (I've seen this in other clues).
'about' means one lot of letters go next to another.
'one' becomes 'i' (Roman numeral).
'ask' put after 'i' is 'iask'.
'iask' with letters rearranged gives 'SAKI'.
(Other definitions for saki that I've seen before include "drink in Tokyo" , "Pseudonymous English writer" , "Japanese alcoholic drink made from rice" , "Japanese beverage" , "Pen-name of Hector Hugh Munro, d. 1916" .)