Heiress's land (4)

I believe the answer is:

eire

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

'land' is the definition.
(Eire is an example)

'heiress's' is the wordplay.
'EIRE' is hidden within the letters.
However, I am uncertain how this is indicated.

Can you help me to learn more?

(Other definitions for eire that I've seen before include "Look for (something to happen)" , "Irish name for Ireland" , "Former name of the Irish Republic" , "Northwest European country" , "Republic across the water" .)

I've seen this clue in the Evening Standard.

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