Current filling subsequently rejected for sale (6)
I believe the answer is:
retail
'sale' is the definition.
(I have seen 'Sale of goods ' mean 'retail' so perhaps 'sale' could also mean 'retail')
'current filling subsequently rejected' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'filling' indicates putting letters inside.
'subsequently' becomes 'later' (subsequently means later on).
'rejected' says the letters should be written backwards.
'i' put within 'later' is 'liater'.
'liater' backwards is 'RETAIL'.
'for' acts as a link.
(Other definitions for retail that I've seen before include "The sale of goods to the public" , "Flog" , "Tell story" , "Sell in small quantities" , "Relate details" .)