Criminal e-traders nabbed by the police (8)
I believe the answer is:
arrested
'nabbed by the police' is the definition.
'criminal e-traders' is the wordplay.
'criminal' indicates anagramming the letters.
'e'+'traders'='etraders'
'etraders' with letters rearranged gives 'ARRESTED'.
(Other definitions for arrested that I've seen before include "Apprehended and taken into custody" , "stalled" , "Apprehended by police" , "Seized and took into custody" , "Detained by legal authority" .)