Like a bear going wrong, landing in river (6)
I believe the answer is:
ursine
'like a bear' is the definition.
(ursine means like or relating to bears)
'going wrong landing in river' is the wordplay.
'going wrong' becomes 'sin' (sinning is going wrong or behaving badly).
'landing in' indicates putting letters inside.
'river' becomes 'ure' (river in Yorkshire).
'sin' placed within 'ure' is 'URSINE'.
(Other definitions for ursine that I've seen before include "like a character in 14 across [=>BEAR]" , "Describing Pooh or Yogi?" , "Bearlike" , "Like Paddington" , "Relating to bears" .)