Prosecutors holding everyone in a Texas city (6)
I believe the answer is:
dallas
'a texas city' is the definition.
(city in Texas)
'prosecutors holding everyone' is the wordplay.
'prosecutors' becomes 'D.A.s' (D.A. is an example).
'holding' indicates putting letters inside.
'everyone' becomes 'all' (all people).
'das' placed around 'all' is 'DALLAS'.
'in' is the link.
(Other definitions for dallas that I've seen before include "All sad at the disappearance of the long-running soap opera?" , "Texas city - old soap" , "American city where JFK was killed" , "former TV series" , "City in the heart of Texan oil fields" .)