Crossword Genius

Old browser? A bot runs ours loosely (12)

Ross

I believe the answer is:

brontosaurus

'old browser?' is the definition.
(extinct animal which fed by browsing)

'a bot runs ours loosely' is the wordplay.
'loosely' indicates anagramming the letters.
'a'+'bot'+'runs'+'ours'='abotrunsours'
'abotrunsours' with letters rearranged gives 'BRONTOSAURUS'.

(Other definitions for brontosaurus that I've seen before include "Prehistoric thunderer?" , "Large herbivorous dinosaur" , "Prehistoric beast (thunder lizard)" , "Dinosaur with a long neck and tail" , "Huge herbivorous Jurassic reptile" .)

I've seen this clue in The Guardian.
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