Law officer right to be included among 'wise men', say (10)
I believe the answer is:
magistrate
'law officer' is the definition.
'right to be included among wise men say' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to be included among' is an insertion indicator.
'wise men' becomes 'magi' (I've seen this before).
'say' becomes 'state' ('state' can be a synonym of 'say'**).
'magi'+'state'='magistate'
'r' going inside 'magistate' is 'MAGISTRATE'.
(Other definitions for magistrate that I've seen before include "Court officer" , "Judge" , "your worship" , "one on the bench" , "Justice of the peace" .)