Sweet wine takes no time to get word of approval (4)
I believe the answer is:
okay
'word of approval' is the definition.
(okay indicates approval)
'sweet wine takes no time' is the wordplay.
'sweet wine' becomes 'tokay' (type of wine).
'takes no' indicates named letters should be taken away.
'time' becomes 't' (abbreviation).
'tokay' with 't' taken out is 'OKAY'.
'to get' is the link.
(Other definitions for okay that I've seen before include "Correct" , "Yes; satisfactory" , "in reasonable health?" , "Common jargon for yes, all right" , "Agree" .)