Could be a Mexican fancy chair ornament (5,8)
I believe the answer is:
north american
'could be a mexican' is the definition.
I can't tell whether this definition defines the answer.
'fancy chair ornament' is the wordplay.
'fancy' indicates anagramming the letters.
'chair'+'ornament'='chairornament'
'chairornament' is an anagram of 'NORTH-AMERICAN'.
Can you help me to learn more?
(Other definitions for north american that I've seen before include "like Getty or Rockefeller, say" , "like Justin Trudeau" , "Continental" .)