Composer that's very typically American (5)
I believe the answer is:
sousa
'composer' is the definition.
(I know that Sousa is a composer)
'very typically american' is the wordplay.
'very' becomes 'so' (both can mean 'extremely').
'typically american' becomes 'usa' (I am not sure about the 'typically' bit.).
'so'+'usa'='SOUSA'
'that's' is the link.
Can you help me to learn more?
(Other definitions for sousa that I've seen before include "John Philip ---, US bandmaster" , "John Philip ..., composer of military marches" , "US march king" , "he produced the Washington Post" , "Composer of "The Stars and Stripes Forever"" .)