Pleasant land? (3)

I believe the answer is:

lea

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

'land?' is the definition.
(I've seen this before)

'pleasant' is the wordplay.
'LEA' is hidden in amongst the letters.
But, I'm unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for lea that I've seen before include "Open arable land (poet.)" , "Meadow (poetic)" , "Field" , "Grazing land" , "Open area of grassy or arable land" .)

I've seen this clue in the Evening Standard.

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