Old fogey? (6)
(Other definitions for fossil that I've seen before include "Fuddy-duddy" , "Lasting impression" , "Petrified 9" , "Ancient remnant hardened in rock" , "Prehistoric relic" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">old fogey</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can mean an old-fashioned person)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dinosaur that I've seen before include "Reptile is around, not really" , "type unable to adapt" , "Extinct terrestrial reptile" , "Beast long gone" , "Prehistoric monster from Jurassic era" .)