Wine tasting’s beginning at Cambridge college (6)
I believe the answer is:
claret
'wine' is the definition.
(claret is a kind of wine)
'tasting's beginning at cambridge college' is the wordplay.
'beginning' says to take the initial letters.
'at' means one lot of letters go next to another (I've seen this in other clues).
'cambridge college' becomes 'clare' (college of Cambridge University).
The initial letter of 'tastings' is 't'.
't' put after 'clare' is 'CLARET'.
(Other definitions for claret that I've seen before include "Dark red Bordeaux wine" , "Alcohol" , "Shade of red" , "Deep purplish-red" , "Red wine from southern France" .)