Speculation that her toy will get broken (6)

I believe the answer is:

theory

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'speculation' is the definition.
(something theorised or speculated)

'her toy will get broken' is the wordplay.
'her toy' can be anagrammed to 'THEORY'.
But, I'm not sure how this is indicated.

'that' acts as a link.

Can you help me to learn more?

(Other definitions for theory that I've seen before include "General principle which explains some aspect of the world" , "Explanation or system of anything" , "Explanatory idea" , "Hypothesis or concept" , "Scientific conjecture" .)

I've seen this clue in The Irish Independent.

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