Equable woman twice left out (5)
I believe the answer is:
level
'equable' is the definition.
(thesaurus)
'woman twice left out' is the wordplay.
'woman' becomes 'eve' (Eve is an example).
'twice' says to double the letters.
'left' becomes 'l' (common abbreviation).
'out' indicates putting letters inside.
'l' doubled is 'll'.
'eve' going inside 'll' is 'LEVEL'.
(Other definitions for level that I've seen before include "Not in front or behind" , "Tier; calm and steady" , "Steady, flat, floor" , "Regular" , "Horizontal plane - a palindrome" .)