Ancient creature - no radius, strangely (8)

I believe the answer is:

dinosaur

I'm a little stuck... Click here to teach me more about this clue!

'ancient creature' is the definition.
'dinosaur' can be an answer for 'creature' (dinosaur is a kind of animal). I am unsure of the 'ancient' bit.

'no radius strangely' is the wordplay.
'strangely' is an anagram indicator.
'no'+'radius'='noradius'
'noradius' with letters rearranged gives 'DINOSAUR'.

Can you help me to learn more?

(Other definitions for dinosaur that I've seen before include "Large extinct reptile" , "Huge beast" , "Prehistoric monster found on Darius" , "Extinct terrestrial reptile" , "Huge prehistoric monster" .)

I've seen this clue in The Daily Express.

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