Drink is very dear, oddly (4)
I believe the answer is:
soda
'drink' is the definition.
(soda is a kind of drink)
'very dear oddly' is the wordplay.
'very' becomes 'so' (I've seen this in other clues).
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternating letters of 'dear' are 'da'.
'so'+'da'='SODA'
'is' is the link.
(Other definitions for soda that I've seen before include ""Splashed" drinks mixer" , "kind of water" , "Splash served with some spirits" , "Alkaline substance used in cleaning, drinks etc" , "fizz" .)