International body mostly bonkers, sadly, but still full of fire (8)
I believe the answer is:
unbroken
'still full of fire' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?
'international body mostly bonkers sadly' is the wordplay.
'international body' becomes 'UN' (short for United Nations).
'mostly' means to remove the last letter (most but not all of the word).
'sadly' indicates anagramming the letters.
'bonkers' with its final letter taken away is 'bonker'.
'bonker' is an anagram of 'broken'.
'un'+'broken'='UNBROKEN'
'but' is the link.
Can you help me to learn more?
(Other definitions for unbroken that I've seen before include "One-piece" , "Continuous" , "Complete" , "Not surpassed" , "Not interrupted" .)