Answer:

HER

Answer	Crossword Clue
HER	"On .... Majesty's ......"
HER	"Tell .. About It" (Joel hit)
HER	'60s White House dog

HER	Old what's-...-name
HER	One of LBJ's beagles
HER	Part of HMS
HER	Part of HRH
HER	That woman
HER	"On .. Majesty's Secret Service"
HER	James Taylor's ".. Town Too"
HER	Johnson beagle

HER	Not him!
HER	One of the girls
HER	"Off with ... head!"
HER	Partner of him
HER	The other woman
HER	A White House beagle
HER	Sailor's pronoun
HER	The H of HRM

HER	2013 computer love movie
HER	That girl
HER	That female
HER	Self starter?
HER	Pronoun
HER	That lady
HER	Nameless woman
HER	That lady yonder

HER	The H. of H.M.S.
HER	LBJ beagle
HER	"And I Love .."
HER	Nautical pronoun
HER	Part of HRH, at times
HER	That feminine one
HER	Part of H.M.S.
HER	The ship's

HER	Yon maiden
HER	My boat
HER	Possessive pronoun
HER	1960s White House pet
HER	"In ... Shoes" (Jennifer Weiner novel)