Clip became coiled? That’s perfect! (10)

I believe the answer is:

impeccable

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'perfect' is the definition.
(similar in meaning)

'clip became coiled?' is the wordplay.
'clip became' anagrams to 'IMPECCABLE'.
But, I'm not clear how the anagram is indicated.

'that's' acts as a link.

Can you help me to learn more?

(Other definitions for impeccable that I've seen before include "Immaculate" , "Faultless" , "In accordance with the highest standards" , "Without fault" , "Perfect - pure" .)

I've seen this clue in The Hindu.

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