Was tight to some extent through wine (4)
I believe the answer is:
asti
'wine' is the definition.
(Italian wine)
'was tight to some extent' is the wordplay.
'to some extent' indicates the answer is hidden within the clue.
'ASTI' is hidden in the letters of 'was tight'.
'through' is the link.
(Other definitions for asti that I've seen before include "Bubbly wine" , "Sparkling white wine" , "Capital of a north-west Italian province, known for its sparking wine" , "Piedmont wine city, SE of Turin" , "Alcohol" .)