Bill found by queen for vessel (6)
I believe the answer is:
beaker
'vessel' is the definition.
(beaker is a kind of vessel)
'bill found by queen' is the wordplay.
'bill' becomes 'beak' (synonyms).
'found' is a charade indicator (letters next to each other).
'by queen' becomes 'er' (short for Elizabeth Regina ie Queen Elizabeth. I am not sure about the 'by' bit.).
'beak'+'er'='BEAKER'
'for' is the link.
Can you help me to learn more?
(Other definitions for beaker that I've seen before include "Open glass, straight with lip, used in laboratory" , "Tall cup or tumbler" , "Cup with a wide mouth" , "Flatbottomed drinking cup" , "Plastic cup without a handle" .)