Police officer in boat is wise person (6)
I believe the answer is:
pundit
'wise person' is the definition.
'pundit' can be an answer for 'person' (pundit is a kind of person). I'm not certain of the 'wise' bit.
'police officer in boat' is the wordplay.
'police officer' becomes 'DI' (abbreviation for Detective Inspector).
'in' indicates putting letters inside.
'boat' becomes 'punt' (type of boat).
'di' going into 'punt' is 'PUNDIT'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for pundit that I've seen before include "Expert (sometimes self-appointed)" , "A learned type" , "Learned Hindu or general expert" , "A learned Hindu or expert generally" , "Pontificating expert" .)