Flow in stream or in Notts river (7)
I believe the answer is:
torrent
'flow' is the definition.
(I know that torrent is a type of current)
'stream or in notts river' is the wordplay.
I cannot quite understand how this works, but
'or' is present in the answer.
'river' could be 'trent' (River Trent) and 'trent' is present in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
'in' is the link.
Can you help me to learn more?
(Other definitions for torrent that I've seen before include "Heavy rain" , "Rush of water" , "Overwhelming flow" , "Host" , "Rushing stream, flood" .)