Up-to-date news of US city trial (6)
I believe the answer is:
latest
'up-to-date news' is the definition.
'latest' can be an answer for 'news' (the latest means the latest news). I am not sure about the 'up-to-date' bit.
'us city trial' is the wordplay.
'us city' becomes 'LA' (abbreviation for Los Angeles).
'trial' becomes 'test' (synonyms).
'la'+'test'='LATEST'
'of' acts as a link.
Can you help me to learn more?
(Other definitions for latest that I've seen before include "Most recent or most unpunctual" , "Most recent (news)" , "State-of-the-art" , "Most recent or most tardy" , "Of most recent date" .)