Answer:

britannia

AnswerCrossword Clue
BRITANNIAShe represents the United Kingdom
BRITANNIAWave ruler of song
BRITANNIAArne's "Rule, ..."
BRITANNIACunard Line's first steamship
BRITANNIAEnglish Empire
BRITANNIAWoman on English money
BRITANNIAGroup of nations: Poet.
BRITANNIA"Rule, ...."
BRITANNIALady of the waves
BRITANNIAIsland province of the Roman Empire
BRITANNIAThomas Arne's 'Rule, --'
BRITANNIAFamed royal yacht