Training on F1 track, wearing extremely expensive footwear (10)
I believe the answer is:
espadrille
'footwear' is the definition.
(espadrille is a kind of footwear)
'training on f1 track wearing extremely expensive' is the wordplay.
I cannot quite see how this works, but
'training' could be 'drill' (drill is a kind of training) and 'drill' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for espadrille that I've seen before include "sandal!" , "Light rope-soled shoe" , "you put your foot in it" , "Cord-soled shoe" , "goes on foot" .)