Crossword Genius

Clear field? (3)

Ross

I believe the answer is:

lea

I'm a little stuck... Click here to teach me more about this clue!

'field?' is the definition.
(lea can mean a meadow or field of grass)

'clear' is the wordplay.
'LEA' is hidden within the letters.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for lea that I've seen before include "Pasture, London river" , "authority for teachers" , "Open grassy land; river" , "Grazing land" , "Poetically, a piece of meadow or pasture" .)

I've seen this clue in the Evening Standard.
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