“The H in H.M.S., for much of the 20th century”

Puccini heroine who "lived for art, lived for love"

C-shaped shop item

One "B" of B&B

Like the base-8 number system

Thus

Tool for Paul Bunyan

Like a subsidiary with only one parent

One making her entrance into society, in brief

Roaring Twenties or Swinging Sixties