Piece of land approachable via a stile (5)

I believe the answer is:

islet

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

'approachable via a stile' is the wordplay.
'stile' can be anagrammed to 'ISLET'.
Though, I'm not clear how the anagram is indicated.

Can you help me to learn more?

(Other definitions for islet that I've seen before include "Tiles to make a small island" , "Eyot, holm, inch" , "Minor key" , "Cay, for example" , "detached territories?" .)

I've seen this clue in the Evening Standard.

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