Well ventilated eagle’s nest, some would say (4)

I believe the answer is:

airy

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

'well ventilated' is the definition.
(letting a lot of air through)

I don't understand the rest of the clue.

(Other definitions for airy that I've seen before include "Lacking substance" , "Delicate; dismissive" , "Delicate; well ventilated" , "Well-ventilated; casual" , "'Up the . . . . mountain / Down the rushy glen' (William Allingham)" .)

I've seen this clue in The Times.

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