Related Clues:
- Parking-garage division
- Equal in height
- Management tier
- Palindromically smooth
- Device ot establish a flat surface
- Straight, even
- Horizontal plane - a palindrome
- Flat and smooth
- Not inclinded to go backwards and forwards
- It's not inclined to go either up or down
- Not inclined to go either way
- With a flat surface
- See 3 Down
- See 2
- Flush, like a girl in the '50s?