One with bent note's solvent (7)
I believe the answer is:
acetone
'solvent' is the definition.
(acetone is a kind of solvent)
'one with bent note's' is the wordplay.
'one' becomes 'ace' ('ace' can be a synonym of 'one'**).
'with' means one lot of letters goes inside another.
'bent' indicates an anagram.
'note' with letters rearranged gives 'eton'.
'ace' enclosing 'eton' is 'ACETONE'.
(Other definitions for acetone that I've seen before include "Colourless solvent" , "Inflammable liquid" , "Common solvent" , "Eat once (anag) - solvent" , "chemical is the solution" .)