Wine for the college titular head (6)
I believe the answer is:
claret
'wine' is the definition.
(claret is a kind of wine)
'college titular head' is the wordplay.
'college' becomes 'clare' (Clare College Cambridge).
'head' says to take the initial letters.
The first letter of 'titular' is 't'.
'clare'+'t'='CLARET'
'for the' is the link.
(Other definitions for claret that I've seen before include "Red wine from southern France" , "drink" , "Dry red wine of Bordeaux" , "Type of red wine" , "Deep purplish-red" .)