Drink neat rum with endless voracity (5,3)
I believe the answer is:
green tea
'drink' is the definition.
(type of tea)
'neat rum with endless voracity' is the wordplay.
'rum' is an anagram indicator (rum can mean strange or unusual).
'with' says to put letters next to each other.
'endless' means to remove the last letter.
'voracity' becomes 'greed' (I've seen this before).
'greed' with its final letter taken away is 'gree'.
'neat' anagrammed gives 'ntea'.
'ntea' after 'gree' is 'GREEN TEA'.
(Other definitions for green tea that I've seen before include "brew-up?" , "Infused drink" , "'Asian herbal drink (5,3)'" , "Beverage" , "Hot drink - teenager (anag)" .)