Insure variety of bear (6)

I believe the answer is:

ursine

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

'insure variety of bear' is the definition.
I can't judge whether this definition defines the answer.

'insure variety' is the wordplay.
'variety' indicates an anagram.
'insure' is an anagram of 'URSINE'.

Can you help me to learn more?

(Other definitions for ursine that I've seen before include "Like Paddington" , "Bearlike" , "Relating to bears" , "like a character in 14 across [=>BEAR]" , "with grizzly features?" .)

I've seen this clue in The Mirror.

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