The term 'ankle cover' can be broken down into three crossword solutions: SPAT (4 letters), TARSI (5 letters), and TARSUS (6 letters). SPAT is a type of shoe or boot that covers the ankle and lower leg. TARSI is the name for the group of seven bones in the human foot that make up the ankle joint. TARSUS is the name for the group of eight bones in the human foot that make up the heel and arch. Together, these three terms refer to the parts of the foot that are covered by an ankle-covering shoe or boot.