Crow, eg, flying in dream (7)
I believe the answer is:
amerind
'crow eg' is the definition.
(I know that Crow is a type of Siouan)
'flying in dream' is the wordplay.
'flying' is an anagram indicator (letters fly around into new positions).
'in'+'dream'='indream'
'indream' anagrammed gives 'AMERIND'.
(Other definitions for amerind that I've seen before include "US native" , "23 [OSAGE] perhaps" , "One from the New World" , "US inhabitant" , "Indigenous American" .)