Hearing for second time about converted trailer (7)
I believe the answer is:
retrial
'hearing' is the definition.
(I have seen 'Further hearing ' mean 'retrial' so perhaps 'hearing' could also mean 'retrial')
'converted trailer' is the wordplay.
'converted' indicates an anagram.
'trailer' with letters rearranged gives 'RETRIAL'.
'for second time about' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for retrial that I've seen before include "Hearing repeat" , "test, after failure in first" , "Revived case" , "Further action" , "Second court hearing" .)