16 Down: Mixed drink - the last of the vermouth in ginger, 6 letters starts with S
19 across:They happen when people buy strong drink in a ship.???a?
22 across: They take part in raids and in scraps. ?a???g?
In 16 down the 3rd letter is the 2nd letter in 19 across and the 5th letter is the 4th letter of 22 across.