You, say, met a thousand at university feast (3)

'feast' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'you say met a thousand at university' is the wordplay.
'say' shows a homophone (sound like).
'met' means one lot of letters go next to another.
'a thousand' becomes 'm' (synonyms).
'at' is a charade indicator (letters next to each other).
'university' becomes 'u' (abbreviation for university).
'you' sounds like 'u'.
'u'+'m'+'u'='UMU'

Can you help me to learn more?