Crossword Genius

Wearing on the track or when driving one’s new car (7,2)

Ross

I believe the answer is:

running in

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'when driving one's new car' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'wearing on the track' is the wordplay.
'wearing' becomes 'in' (as in being 'in' certain clothes).
'on' says to put letters next to each other.
'the track' becomes 'running' ('running' can be a synonym of 'track').
'in' put after 'running' is 'RUNNING IN'.

'or' acts as a link.

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