Bartender on "The Love Boat” (5)
I believe the answer is:
isaac
'bartender on the love boat' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for isaac that I've seen before include "Biblical patriarch" , "Sir -- Newton, English scientist" , "biblical figure" , "Esau's father" , "Sacrificial offering" .)