Barman is going to party at university in raptures (8)
I believe the answer is:
blissful
'at university in raptures' is the definition.
I can't tell whether this definition defines the answer.
'barman is going to party' is the wordplay.
'barman' becomes 'bl' (I've seen this in other clues).
'going to' becomes 'sfu' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'party' becomes 'l'.
'bl'+'is'+'sfu'+'l'='BLISSFUL'
Can you help me to learn more?
(Other definitions for blissful that I've seen before include "Completely happy and contented" , "Joyous, rapt" , "Ecstatic, rapturously happy" , "Full of joy" , "Extremely happy" .)