Beloved after drink expressing contrasting emotions (11)
I believe the answer is:
bittersweet
'expressing contrasting emotions' is the definition.
(evoking happy and sad emotions)
'beloved after drink' is the wordplay.
'beloved' becomes 'sweet'.
'after' says to put letters next to each other.
'drink' becomes 'bitter' (bitter is a kind of drink).
'sweet' put after 'bitter' is 'BITTERSWEET'.
(Other definitions for bittersweet that I've seen before include "arousing mixed feelings" , "Climber" , "Mixing pleasure and pain" , "Arousing pleasure tinged with pain" , "At once pleasurable and painful" .)