Returning some of Tait's authentic wine from Italy (4)
I believe the answer is:
asti
'wine from italy' is the definition.
(I've seen this in another clue)
'returning some of tait's authentic' is the wordplay.
'returning' is a reversal indicator.
'some of' indicates the answer is hidden within the clue.
'itsa' can be found hidden inside 'taits authentic'.
'itsa' in reverse letter order is 'ASTI'.
(Other definitions for asti that I've seen before include "Capital of a north-west Italian province, known for its sparking wine" , "Fizzy wine" , "Sparkling drink" , "Bubbly wine" , "Italian drunk" .)