Lift one's spirits?
'lift one's spirits?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for imbibe that I've seen before include "Drink or absorb into mind" , "Take in (with one's mother's milk?)" , "Partake of drink" , "Quaff" , "Swallow" .)
(Other definitions for toast that I've seen before include "'----- of the Town': one receiving the acclaim of one's peers" , "Health-giving" , "Drink the health of - brown bread!" , "Cheers" , "making this pledge?" .)