Very fast channel of water (6)
I believe the answer is:
solent
'channel of water' is the definition.
The definition suggests a singular noun which matches the answer.
'very fast' is the wordplay.
'very' becomes 'so' (I've seen this in other clues).
'fast' becomes 'lent' (I've seen this before).
'so'+'lent'='SOLENT'
Can you help me to learn more?
(Other definitions for solent that I've seen before include "Channel separating Hampshire from the Isle of Wight" , "Channel north of the Isle of Wight" , "Confine as a prisoner" , "Channel N. of IOW" , "South coast channel" .)