Drink as alternative to the cool cha? (3,9)
I believe the answer is:
hot chocolate
'drink' is the definition.
(hot chocolate is a kind of drink)
'alternative to the cool cha?' is the wordplay.
'alternative' is an anagram indicator (an alternative ordering of the letters).
'to'+'the'+'cool'+'cha'='tothecoolcha'
'tothecoolcha' is an anagram of 'HOT CHOCOLATE'.
'as' acts as a link.
(Other definitions for hot chocolate that I've seen before include "Warm drink" , "Bedtime drink" , "Warming drink" , "Drink with cocoa powder" , "Beverage" .)