Way to tuck into excellent drink (4)
I believe the answer is:
asti
'drink' is the definition.
(Asti is a type of wine)
'way to tuck into excellent' is the wordplay.
'way' becomes 'st' (abbreviation for street).
'to tuck into' is an insertion indicator.
'excellent' becomes 'ai' (resembles 'A1', old-fashioned term for excellent).
'st' put into 'ai' is 'ASTI'.
(Other definitions for asti that I've seen before include "Italian 'sparkler'" , "Italian product" , "Capital of a north-west Italian province, known for its sparking wine" , "Alcohol" , "It's a (anag) - wine" .)