Parking during 180-degree spin in vehicle shows improvement (6)
I believe the answer is:
upturn
'improvement' is the definition.
(upturn is a kind of improvement)
'parking during 180' is the wordplay.
'parking' becomes 'p' (abbreviation on road signs).
'during' is an insertion indicator.
'180' becomes 'u-turn' (I've seen this in another clue).
'p' inserted inside 'uturn' is 'UPTURN'.
'degree spin in vehicle shows' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for upturn that I've seen before include "Improvement, better trend in business" , "Improvement in fortunes" , "Recovery" , "Improvement in results" , "Improvement, in business say" .)