Related Clues:
- Unit in the definition of surface tension
- Love letter letters
- Ten micronewtons
- Unit in an erg's definition
- A little force?
- Letters in love letters
- Letters at the end of a love letter
- Hundred-thousandth of a newton
- Love letter closing, and in sequence, a hint to the ends of 18-, 28-, 48- and 64-Across
- Physics class unit
- Love letters
- Love letter sign-off
- Cutesy sign-off
- Measure of force
- Affectionate sign-off