Answer:

ENS

Answer	Crossword Clue
ENS	Nation's boundaries?
ENS	Annapolis grads.
ENS	Cincinnati trio

ENS	Nav. officer
ENS	Nav. rank
ENS	Printers' measures
ENS	USNA grad
ENS	Annapolis grad
ENS	Naval officer; abbr
ENS	Printer's measures
ENS	Type widths

ENS	Madonna has two
ENS	Printing spaces
ENS	Tennis twosome?
ENS	U.S.N.A. grad
ENS	Cincinnati trio?
ENS	Couple of pennies?
ENS	Naval off.
ENS	USNA graduate

ENS	Printers' dashes
ENS	Starfleet Acad. grad
ENS	Pulver's rank (abbr.)
ENS	West German river
ENS	Metaphysical being
ENS	English nus
ENS	Nanny's trio
ENS	Lennon's trio

ENS	Ninny's trio
ENS	Type measures
ENS	Navy rank (abbr.)
ENS	Some dash lengths
ENS	USNA rank (abbr.)
ENS	Dash widths
ENS	Moneypenny's trio
ENS	Minnesota twins?

ENS	Zees on their sides
ENS	Off. above a midshipman
ENS	USN rank
ENS	Annapolis grad.
ENS	Finnish twins?

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.