A year's worth of the drink, son, inside for us — no getting drunk! (4,7)
I believe the answer is:
four seasons
'a year's worth' is the definition.
'the drink son inside for us no getting drunk' is the wordplay.
I cannot quite see how this works, but
'drink' could be 'sea' (I have seen 'The drink' mean 'sea' so perhaps 'drink' could also mean 'sea') and 'sea' is found in the answer.
an anagram of 'son' is 'ons' which is present in the answer.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is located in the answer.
The remaining letters 'furs' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
(Another definition for four seasons that I've seen is " Vivaldi work".)