Nick a translation of Sartre (6)
I believe the answer is:
arrest
'nick' is the definition.
(thesaurus)
'a translation of sartre' is the wordplay.
'a translation of' indicates an anagram (I've seen this in other clues).
'sartre' is an anagram of 'ARREST'.
(Other definitions for arrest that I've seen before include "Stop (on suspicion)" , "Seize (a crime suspect)" , "Take into custody as police do" , "Collar" , "Catch" .)