Neat drink followed by half of beer (5)
I believe the answer is:
super
'neat' is the definition.
(thesaurus)
'drink followed by half of beer' is the wordplay.
'drink' becomes 'sup' (I've seen this before).
'followed by' is a charade indicator (letters next to each other).
'half of' means to take half the letters.
'beer' with half the letters taken is 'er'.
'sup'+'er'='SUPER'
(Other definitions for super that I've seen before include "Exceptionally good" , "Peachy" , "Informally terrific, splendid" , "Delightful" , "Excellent - small-part actor" .)