Answer: qeii

AnswerCrossword Clue
QEIIUK VIP
QEIIMonarch who took the throne in '52
QEIIU.K. V.I.P.
QEIIFamed Cunard liner, for short
QEIIFamed liner, briefly
QEIIKate Middleton's mother-in-law, for short
QEIILongest-reigning British monarch, informally
QEIIRoyal who's notably a crossword fan, for short
QEIIRole for Helen Mirren, briefly
QEIILong-reigning English monarch, informally
QEIIMonarch moniker, for short
QEIIHelen Mirren's crowning role, informally?
QEIIBritish monarch beginning in '52
QEIIRuler crowned in 1953, informally
QEIIOscar-winning role for Helen Mirren, in brief
QEIIModern-day monarch, for short
QEII... Centre (London conference building named for a living royal)
QEIILegendary ocean liner, familiarly
QEIIBritish monarch, initially
QEIICunard vessel named for a reigning monarch, familiarly
QEIIRoyally named liner, briefly
QEIIFormer Cunard fleet member, for short
QEIIRetired Cunard liner, briefly
QEIIRetired Cunard flagship, for short
QEIICunard flagship for 35 yrs.
QEIILiner of note
QEIIFormer Cunard flagship, for short
QEIIPrince Philip's wife, for short
QEIIRoyal Brit, in brief
QEIIKate Middleton's nana-in-law, briefly
QEIICunard retiree, briefly
QEIIAwarder of MBEs