Tucked in is a phrase that describes the act of being tucked into bed, usually by a parent or guardian. The crossword solutions for this term are 'ATE' (3 letters), 'SNUG' (4 letters), and 'ABED' (4 letters). 'ATE' can refer to the act of eating, while 'SNUG' is an adjective meaning comfortable and secure. Finally, 'abed' is an adverb meaning in bed. Together, these three words describe the act of being tucked in for the night.