Answer: xysts

AnswerCrossword Clue
XYSTSPorticoes for athletics.
XYSTSCovered porticos, in Greek architecture
xysts(in an ancient Roman villa) a garden walk planted with trees
xystsXYST, a roofed area for athletic training ancient Greece, also XYSTUS, XYSTOS
xysts(in ancient Greek and Roman architecture) a covered portico, as a promenade