Toxic pro hit out, loosening up when shaken? (11)

I believe the answer is:

thixotropic

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'loosening up when shaken?' is the definition.
I can't judge whether this defines the answer.

'toxic pro hit out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'toxic'+'pro'+'hit'='toxicprohit'
'toxicprohit' with letters rearranged gives 'THIXOTROPIC'.

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I've seen this clue in The Independent.

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