Comfortably settled hens conceded boxes (9)

I believe the answer is:

ensconced

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

'comfortably settled' is the definition.
'ensconced' can be an answer for 'settled' (I've seen this before). I'm not sure about the 'comfortably' bit.

'hens conceded boxes' is the wordplay.
'boxes' indicates the answer is hidden within the clue (to box can mean to contain).
'ENSCONCED' is hidden within 'hens conceded'.

Can you help me to learn more?

(Other definitions for ensconced that I've seen before include "Settled comfortably" , "Installed" , "in safe seat" , "Safely established" .)

I've seen this clue in The Telegraph.

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