Gravely

3 clues
Solemnly
With a straight face
How bad news may be given
Similar answers:
Abrasively
Absolutegravity
Abusively
Academicgrades
Academicprogram
Acowoncegrazed
Actively
Actofgrace
Adamsgrandson
Adayatthegraces
Aerialphotograph
Aerogram
Againstgrain
Againstthegrain
Aggrade
Aggrades
Aggrandize
Aggravate
Aggravated
Aggravatedasalt