Answer: xoxo

AnswerCrossword Clue
XOXO

Love letter sign-off

XOXO

Letter ender

XOXO

Love letters

XOXO
Short and sweet sign-off
XOXO
Common sign-off
XOXOHugs and kisses, symbolically
XOXOLove letter closer, perhaps
XOXO"Hugs and kisses," in letters
XOXOHugs and kisses
XOXOHugs and kisses, briefly
XOXOValentine letters
XOXO"..., Gossip Girl"
XOXOFan letters?
XOXOCutesy sign-off
XOXOLetters in love letters
XOXOHugs and kisses, in letters
XOXOHugs and kisses, in a note
XOXOSWAK alternative
XOXOLove letter letters
XOXOSigns of affection
XOXOLove letters?
XOXOLetters at the end of a love letter