Second drunk turned up to mix salad (4)
I believe the answer is:
toss
'mix salad' is the definition.
(I've seen this in another clue)
'second drunk turned up' is the wordplay.
'second' becomes 's' (common abbreviation).
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'turned up' says the letters should be written in reverse.
's'+'sot'='ssot'
'ssot' backwards is 'TOSS'.
'to' acts as a link.
(Other definitions for toss that I've seen before include "Raise a little money" , "Throw carelessly" , "Throw (coin) so as to choose" , "Ditch" , "'Flip, a coin or pancake say (4)'" .)