Every Russian in sporty car to gad about (9)
I believe the answer is:
Here is my best explanation:
'gad about' is the definition.
'every russian in sporty car' is the wordplay.
'every' becomes 'all' ('all' can be similar in meaning to 'every').
'russian' becomes 'ivan' (I've seen this before).
'in' is an insertion indicator.
'sporty car' becomes 'gt' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'allivan' placed within 'gt' is 'GALLIVANT'.
'to' acts as a link.