Glowing, having drunk ale during annual event (6)
I believe the answer is:
agleam
'glowing having drunk ale during' is the definition.
I can't tell whether this definition defines the answer.
'annual event' is the wordplay.
'annual' becomes 'a' (this might be a standard abbreviation of which I'm unaware).
'event' becomes 'gleam' (gleam is a kind of event).
'a'+'gleam'='AGLEAM'
Can you help me to learn more?
(Other definitions for agleam that I've seen before include "Bright" , "Shining brightly" , "Sparkling" , "scintillating" .)