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 within the letters.
But, I am 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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