Thousand still confused before somebody has burdensome responsibility (9)
I believe the answer is:
millstone
'burdensome responsibility' is the definition.
'millstone' can be an answer for 'responsibility' (I've seen this before). I am unsure of the 'burdensome' bit.
'thousand still confused before somebody' is the wordplay.
'thousand' becomes 'M' (Roman numeral for a thousand).
'confused' indicates an anagram.
'before' means one lot of letters go next to another.
'somebody' becomes 'one' (one can mean some person).
'still' with letters rearranged gives 'illst'.
'm'+'illst'+'one'='MILLSTONE'
'has' acts as a link.
Can you help me to learn more?
(Other definitions for millstone that I've seen before include "Grinding disc; wearisome burden" , "Heavy burden" , "Heavy and inescapable responsibility" , "something hard to bear" .)