The term 'soak up some rays' is a phrase used to describe the activity of sunbathing. Sunbathing involves exposing oneself to the SUN's rays in order to get a TAN. The crossword solutions for this phrase are SUN (3 letters), SUNBATHE (8 letters), BASK (4 letters), and TAN (3 letters). SUN is an abbreviation for the star that provides light and heat to the Earth, while SUNBATHE is the act of lying in the SUN for pleasure or health benefits. BASK is to expose oneself to warmth, and TAN is the result of exposure to the SUN's ultraviolet rays.