Turn up in part near river (6)
I believe the answer is:
arrive
'turn up' is the definition.
(I've seen this in another clue)
'part near river' is the wordplay.
'part' indicates the answer is hidden within the clue.
'ARRIVE' is hidden in the letters of 'near river'.
'in' acts as a link.
(Other definitions for arrive that I've seen before include "Reach a place" , "Get there" , "Reach destination or desired position" , "Show up" , "Reach destination or achieve success" .)