The term FOOT IN SET is a phrase used to describe a situation in which someone is firmly established in a particular place or position. It is often used to describe someone who has achieved a certain level of success or recognition in their field. The crossword solutions for this term are 'ROOT' and 'PLANT'. These words both refer to the idea of being firmly established in a particular place or position, as a ROOT is the part of a PLANT that is firmly planted in the ground and a PLANT is something that is firmly rooted in the soil.