Answer:

cooing

Answer	Crossword Clue
COOING	Whispering sweet nothings
COOING	Emulating a dove
COOING	Speaking lovingly

COOING	Billing's partner
COOING	Dove's activity
COOING	Talking amorously
COOING	Sound from the dovecote
COOING	Emulating a pigeon
COOING	Making baby or dove noises
COOING	Rooftop communication

Crossword

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