Vessel finding quantity of current in sound reduced (6)
I believe the answer is:
sampan
'vessel' is the definition.
(sampan is a kind of vessel)
'quantity of current in sound reduced' is the wordplay.
I cannot really see how this works, but
'quantity' could be 'amp' (amp is a kind of quantity) and 'amp' is present in the answer.
The remaining letters 'san' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'finding' acts as a link.
Can you help me to learn more?
(Other definitions for sampan that I've seen before include "Far Eastern rowing vessel" , "oriental vessel" , "Far Eastern boat" , "Small Asian rowing boat" , "East Asian boat" .)