Captain cheer? Left Queen for US tunesmith? (4,6)
I believe the answer is:
cole porter
'captain cheer?' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'left queen for us tunesmith?' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'for' means one lot of letters go next to another (I've seen this in other clues).
'us tunesmith?' becomes 'cole' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'port'+'er'='porter'
'porter' after 'cole' is 'COLE PORTER'.
Can you help me to learn more?
(Other definitions for cole porter that I've seen before include "Broadway composer" , "US man of note" , "Let's Do It songwriter" , "Man responsible for standards" .)