It's bound to mean a change of plea (4)

I believe the answer is:

leap

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'it's bound' is the definition.
(synonyms)

'mean a change of plea' is the wordplay.
'plea' can be anagrammed to 'LEAP'.
Though, I am unsure how the anagram is indicated.

'to' is the link.

Can you help me to learn more?

(Other definitions for leap that I've seen before include "Sudden bound" , "identify extra day?" , "Jump suddenly" , "Sort of year" , "Jump across" .)

I've seen this clue in The Globe and Mail.

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