Equal or flat (5)
I believe the answer is:
level
This clue is a double definition.
'equal' is the first definition.
(I've seen this in another clue)
'flat' is the second definition.
(I know that flat can be written as level)
(Other definitions for level that I've seen before include "Balanced" , "Uniform" , "Regular" , "Flat, even" , "Straight, even" .)