Mineralised relic of a long-dead organism (6)
I believe the answer is:
fossil
(Other definitions for fossil that I've seen before include "I floss (anag.)" , "old boy?" , "Petrified 9" , "Petrified relic" , "Fogeyish old thing" .)
I believe the answer is:
fossil
(Other definitions for fossil that I've seen before include "I floss (anag.)" , "old boy?" , "Petrified 9" , "Petrified relic" , "Fogeyish old thing" .)