Quality gerbil a cat's snatched from behind (7)

I believe the answer is:

calibre

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

'quality' is the definition.
('calibre' can be a synonym of 'quality')

'gerbil a cat's snatched from behind' is the wordplay.
'CALIBRE' is hidden back-to-front within the letters.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for calibre that I've seen before include "Quality - gun barrel bore" , "bore on the Tube?" , "Quality of character" , "Ability; barrel diameter" , "measure of a bore" .)

I've seen this clue in The Telegraph.

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