Physical movement of body from Viagra? Not excited with it (11)

I believe the answer is:

gravitation

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'physical movement of body' is the definition.
I can't tell whether this definition defines the answer.

'viagra? not excited with it' is the wordplay.
'excited with' is an anagram indicator.
'viagra'+'not'='viagranot'
'viagranot' with its letters mixed up with 'it' makes 'GRAVITATION'.

'from' is the link.

Can you help me to learn more?

(Other definitions for gravitation that I've seen before include "Attractive force" , "Force of attraction between masses" .)

I've seen this clue in The Guardian.

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