Soprano as well as a queen with billions in offshore bank (7)
I believe the answer is:
sandbar
'offshore bank' is the definition.
'sandbar' can be an answer for 'bank' (thesaurus). I am not sure about the 'offshore' bit.
'soprano as well as a queen with billions' is the wordplay.
'soprano' becomes 's' (musical abbreviation).
'as well as' becomes 'and' (I've seen this in other clues).
'queen' becomes 'r' (r is abbreviation regina. e.g. in ER ).
'with' means one lot of letters go next to another.
'billions' becomes 'b'.
'a'+'r'='ar'
'ar' put after 'b' is 'bar'.
's'+'and'+'bar'='SANDBAR'
'in' acts as a link.
Can you help me to learn more?
(Another definition for sandbar that I've seen is " Danger for sailors".)