Old fossil is around, unfortunately (8)
I believe the answer is:
dinosaur
'old fossil' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'is around unfortunately' is the wordplay.
'unfortunately' indicates anagramming the letters (a bad or unfortunate spelling).
'is'+'around'='isaround'
'isaround' with letters rearranged gives 'DINOSAUR'.
Can you help me to learn more?
(Other definitions for dinosaur that I've seen before include "Extinct reptilian animal" , "Extinct reptile - very outdated thing" , "Eg, triceratops" , "Large extinct reptile" , "Creature no longer" .)