Car safety feature put on that is something a mouse can move (6,3)

I believe the answer is:

scroll bar

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'something a mouse can move' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'car safety feature put on that is' is the wordplay.
'car safety feature' becomes 'roll bar' (I've seen this in another clue).
'put on' means one lot of letters go next to another (some letters go on or after others).
'that is' becomes 'sc' (abbreviation for Latin scilicet meaning 'namely').
'rollbar' after 'sc' is 'SCROLL BAR'.

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I've seen this clue in The Times.

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