lighten Solutions Make less serious has 4 entries with similar clues 8-letter wordsescalateMake more serious/severe9-letter wordsaggravateMake more serious/severe11-letter wordsextenuatingShowing reasons why an offence should be treated less seriously21-letter wordsdampen-the-spirits-ofMake one less vigorous or less eager
Solutions Make less serious has 4 entries with similar clues 8-letter wordsescalateMake more serious/severe9-letter wordsaggravateMake more serious/severe11-letter wordsextenuatingShowing reasons why an offence should be treated less seriously21-letter wordsdampen-the-spirits-ofMake one less vigorous or less eager