Poetical land of suffering (4)

I believe the answer is:

erin

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

'poetical land' is the definition.
'erin' can be an answer for 'land' (I've seen this before). I'm not certain of the 'poetical' bit.

'of suffering' is the wordplay.
'of' says the answer is hidden in the clue.
'ERIN' is hidden in the letters of 'suffering'.

Can you help me to learn more?

(Other definitions for erin that I've seen before include "Another name for 11 ac" , "Old Ireland" , "Literary term for Ireland" , "country" , "that faces Atlantic" .)

I've seen this clue in the Evening Standard.

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