Conduct review of unrestricted river harbour after docking (9)
I believe the answer is:
behaviour
'conduct' is the definition.
(I know that behaviour is a type of conduct)
'review of unrestricted river harbour after docking' is the wordplay.
'review of' indicates anagramming the letters.
'unrestricted' says to take the centre (remove the outside letters which restrict the rest).
'after docking' means to remove the last letter (to dock is to remove the end from).
The centre of 'river' is 'ive'.
'harbour' with its final letter removed is 'harbou'.
'ive'+'harbou'='iveharbou'
'iveharbou' with letters rearranged gives 'BEHAVIOUR'.
(Other definitions for behaviour that I've seen before include "Personal conduct" , "manners" , "Conduct, demeanour" , "Bearing" , "Comportment" .)