GET MELLOW is an expression used to describe a state of relaxation and contentment. The crossword solutions for this term are AGE (3 letters), RIPEN (5 letters), and RELAX (5 letters). AGE refers to the process of growing older, which can often lead to a more mellow attitude. RIPEN is the process of maturing, which can also lead to a more relaxed state of being. Finally, RELAX is the act of calming down and letting go of stress, which is essential for achieving a mellow mood.