Out of Action' is a term used to describe a person or object that is unable to function in its normal capacity. The crossword solutions for this term are IDLE, ONICE, LAIDUP, SIDELINED, and HORSDECOMBAT. IDLE means to be inactive or not doing anything, ONICE is an acronym for 'Out of Nowhere In Case of Emergency', LAIDUP is a term used to describe someone who is confined to bed due to illness or injury, SIDELINED means to be excluded from participating in something, and HORSDECOMBAT is a term used to describe a horse that has been retired from racing.