Crossword Genius

A pretty cold, agitated old reptile (11)

Ross

I believe the answer is:

pterodactyl

'old reptile' is the definition.
(prehistoric reptile)

'a pretty cold agitated' is the wordplay.
'agitated' is an anagram indicator.
'a'+'pretty'+'cold'='aprettycold'
'aprettycold' anagrammed gives 'PTERODACTYL'.

(Other definitions for pterodactyl that I've seen before include "Late Jurassic flyer" , "Extinct flying reptile - protect lady (anag)" , "Extinct flier" , "Flying creature" , "Winged reptile of old" .)

I've seen this clue in The Times.
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