Otherwise, even a measure? (3)
I believe the answer is:
lea
'measure?' is the definition.
(lea is a kind of measure)
'otherwise even a' is the wordplay.
'otherwise even' becomes 'le' (I can't explain this - if you can you should believe this answer much more).
'le'+'a'='LEA'
Can you help me to learn more?
(Other definitions for lea that I've seen before include "Poetically, a piece of meadow or pasture" , "Open pasture" , "Land growing grass" , "Meadowland" , "River flowing through London" .)