Because
lat	1998	MALM	Limestone
lat	1998	MALTA	Mediterranean land
lat	1998	MAMA	Dad's darling
lat	1998	MAMET	Playwright David
lat	1998	MANATEE	Sea cow
lat	1998	MANATEE	Sea cow
lat	1998	MANCHU	Chinese dynasty
lat	1998	MANES	Horse hairs
lat	1998	MANGO	Tropical fruit
lat	1998	MANNA	Biblical bread
lat	1998	MANO	Hand, in Madrid
lat	1998	MANO	_____ -war-bird
lat	1998	MANON	Massenet opera
lat	1998	MANSE	Clergyman's home
lat	1998	MANSION	Regal residence
lat	1998	MANX	Tailless cat
lat	1998	MANY	Numerous
lat	1998	MAO	China's principal Marxist
lat	1998	MAO	Long March leader
lat	1998	MAORI	New Zealand native
lat	1998	MAORI	New Zealand native
lat	1998	MAORI	New Zealand natives
lat	1998	MAPLE	Sappy tree
lat	1998	MARC	_____ Antony
lat	1998	MARE	Moon feature
lat	1998	MARIESTCLARE	Little Eva's mother
lat	1998	MARINE	Leatherneck
lat	1998	MARIO	Cuomo or Puzo
lat	1998	MARIO	NHL's Lemieux
lat	1998	MARIS	A Bronx bomber
lat	1998	MARIS	Mantle's teammate
lat	1998	MARK	Nob Hill hotel
lat	1998	MARL	Clayey deposit
lat	1998	MARMOSET	Long-tailed monkey
lat	1998	MARNE	Seine tributary
lat	1998	MARSH	Author Ngaio
lat	1998	MART	Trade center
lat	1998	MARTA	Arthur Tracy's theme song
lat	1998	MARTEN	Weasel family member
lat	1998	MARYRUDGE	Barnaby's mother
lat	1998	MASA	Cornmeal
lat	1998	MASER	Electromagnetic wave device
lat	1998	MASH	Swit sitcom
lat	1998	MASHEDPOTATOTIME	Starch from Dee Dee Sharp?
lat	1998	MASHES	Some sour distillations
lat	1998	MASON	Street's boss
lat	1998	MAT	Tatami
lat	1998	MATCH	Sports contest
lat	1998	MATS	Gym cushioners
lat	1998	MATS	Welcome items
lat	1998	MATT	Damon of Good Will ..."
The 6th letter is R
The 3rd letter is L
The 5th letter is O