Insure building related to The Three Bears perhaps (6)

I believe the answer is:

ursine

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'related to the three bears perhaps' is the definition.
I can't tell whether this defines the answer.

'insure building' is the wordplay.
'building' 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 "Bearlike" , "Relating to bears" , "with grizzly features?" , "Describing Pooh or Yogi?" , "Like Paddington" .)

I've seen this clue in the Irish Times (Crosaire) and The Irish Times.

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