Enter age deceptively to get drink (5,3)
I believe the answer is:
green tea
'drink' is the definition.
(I've seen this before)
'enter age deceptively' is the wordplay.
'deceptively' is an anagram indicator.
'enter'+'age'='enterage'
'enterage' with letters rearranged gives 'GREEN TEA'.
'to get' acts as a link.
(Other definitions for green tea that I've seen before include "Food at the golf club" , "'Asian herbal drink (5,3)'" , "Healthy drink" , "Infusion" , "Colourful drink for teenager" .)