Regrettable crumbling of nature holding fruit back (11)

I believe the answer is:
unfortunate
'regrettable' is the definition.
(similar in meaning)
'crumbling of nature holding fruit back' is the wordplay.
'crumbling' becomes 'unfo' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'holding' says to put letters next to each other.
'back' says to take the final letters (the letter at the back).
The final letter of 'fruit' is 't'.
'nature'+'t'='naturet'
'naturet' is an anagram of 'rtunate'.
'unfo'+'rtunate'='UNFORTUNATE'
Can you help me to learn more?
(Other definitions for unfortunate that I've seen before include "Miserable" , "Hapless" , "unlucky person" , "Inauspicious" , "Not lucky; regrettable" .)
