A quarantine, in Irish isles (4)

I believe the answer is:

aran

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

'a quarantine in irish isles' is the definition.
I can't tell whether this definition defines the answer.

'a quarantine in' is the wordplay.
'in' says the answer is hidden in the clue.
'ARAN' can be found hidden inside 'quarantine'.

Can you help me to learn more?

(Other definitions for aran that I've seen before include "Irish style of knitwear" , "Galway Bay isle" , "-- Islands; -- sweater" , "Irish islands" , "traditional type of knitwear" .)

Want a hint initially instead of a full solution? Install my app