Served up friends at a wake a lavish meal (6)
I believe the answer is:
slapup
'a wake a lavish meal' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'served up friends at' is the wordplay.
'served up' says the letters should be written in reverse (in a down clue, going upwards).
'friends' becomes 'pals' (pal is a kind of friend).
'at' becomes 'up' (I can't justify this - if you can you should believe this answer much more).
'pals' reversed gives 'slap'.
'slap'+'up'='SLAPUP'
Can you help me to learn more?
(Another definition for slapup that I've seen is " sort of meal?".)