Bike race stage in California cleared bumpy section of road (6,4)
I believe the answer is:
cattle grid
'road' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?
'bike race stage in california cleared bumpy section' is the wordplay.
'bike race' becomes 'tt' (short for time trial, type of race).
'stage' becomes 'leg' (a leg is a stage of a competition).
'in' is an insertion indicator.
'california' becomes 'c'.
'cleared bumpy section' becomes 'arid' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'tt'+'leg'='ttleg'
'c'+'arid'='carid'
'ttleg' inserted within 'carid' is 'CATTLE-GRID'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for cattle grid that I've seen before include "Stock control" , "a few bars restricting entry" .)