Police officer with prisoners brought before board (9)

I believe the answer is:

constable

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'police officer' is the definition.

'before board' is the wordplay.
'before' becomes 'cons' (I can't explain this - if you can you should believe this answer much more).
'board' becomes 'table' ('table' can be a synonym of 'board').
'cons'+'table'='CONSTABLE'

'with prisoners brought' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for constable that I've seen before include "Law enforcer" , "English landscape painter for a policeman" , "CARRY ON FILM" , "in blue?" , "Force member" .)

I've seen this clue in The Telegraph.

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