Laid on the floor and prepared to drink (3,4)
I believe the answer is:
set down
'laid on the floor' is the definition.
(as in setting something down on the ground)
'prepared to drink' is the wordplay.
'prepared' becomes 'set' (I've seen this before).
'to drink' becomes 'down' (to down something can mean to drink it quickly).
'set'+'down'='SET-DOWN'
'and' is the link.
(Other definitions for set down that I've seen before include "performance in Wimbledon match?" , "Snub" , "player's position at Wimbledon, perhaps" , "Put into writing" , "Record in writing" .)