Fish from deep (4)
I believe the answer is:
Here is my best explanation:
This clue is a double definition.
'fish' is the first definition.
(bass is a kind of fish)
'deep' is the second definition.
('bass' can be a synonym of 'deep')
'from' is the link.
(Other definitions for bass that I've seen before include "Male singer and saltwater fish", "Large fish - singer", "Low singer", "Fish (which sings?)", "A fish; a voice", "part of score", "Singer; fish", "Variety of sea and freshwater perch", "Deep-toned" and "Booming percussion instrument".)