Meat and drink — first requirement for party (4)
I believe the answer is:
rump
'meat' is the definition.
(rump is a kind of meat)
'drink first requirement for party' is the wordplay.
'drink' becomes 'rum' (rum is a kind of drink).
'first requirement for' suggests taking the first letters.
The initial letter of 'party' is 'p'.
'rum'+'p'='RUMP'
'and' is the link.
(Other definitions for rump that I've seen before include "Depleted legislators" , "Backside" , "Unimportant remnant" , "historical Parliament" , "Fleshy hindquarters" .)