Unusual claims about American shows like 'Oklahoma (8)
I believe the answer is:
musicals
'like 'oklahoma' is the definition.
I can't tell whether this defines the answer.
'unusual claims about american' is the wordplay.
'unusual' indicates an anagram.
'about' means one lot of letters goes inside another.
'american' becomes 'US' (United States).
'claims' anagrammed gives 'micals'.
'micals' enclosing 'us' is 'MUSICALS'.
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for musicals that I've seen before include "Stage shows with songs and dance" , "'South Pacific and Carousel, say (8)'" , "Hair and Grease" .)