Detached area? I’ll say! (4)

I believe the answer is:

isle

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

'detached area?' is the definition.
'isle' can be an answer for 'area?' (I have seen 'Area of land' mean 'isle' so perhaps 'area' could also mean 'isle'). I am not certain of the 'detached' bit.

'i'll say' is the wordplay.
'say' shows a homophone (sound like).
'ill' sounds like 'ISLE'.

Can you help me to learn more?

(Other definitions for isle that I've seen before include "9 ac perhaps" , "Detached place" , "Dogs, maybe" , "Sea-girt land" , "Sea-girt area" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.