Crossword Genius

Law officer tricks board (9)

Ross

I believe the answer is:

constable

'law officer' is the definition.
(constable is a kind of law officer)

'tricks board' is the wordplay.
'tricks' becomes 'cons' (I've seen this before).
'board' becomes 'table' (synonyms).
'cons'+'table'='CONSTABLE'

(Other definitions for constable that I've seen before include "British painter and police officer" , "Did he have a brush" , "He painted" , "Policeman - landscape artist" , "Artist; police officer" .)

I've seen this clue in The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.