Answer:

softly

Answer	Crossword Clue
SOFTLY	p, to a pianist
SOFTLY	"Speak ... and carry a big stick"
SOFTLY	Piano, to a musician

SOFTLY	p, to Puccini
SOFTLY	"Speak ... and . . . "
SOFTLY	Piano
SOFTLY	With tenderness

Crossword

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