Firefly, maybe, with silky coat from South America (5)
I believe the answer is:
rufus
'firefly maybe' is the definition.
(Rufus T Firefly, character in the film Duck Soup)
'with silky coat from south america' is the wordplay.
'with' says to put letters next to each other.
'silky coat' becomes 'fur' (an animal's coat).
'from south' is a reversal indicator.
'america' becomes 'US' (United States).
'fur' backwards is 'ruf'.
'ruf' put next to 'us' is 'RUFUS'.
(Other definitions for rufus that I've seen before include "chap" , "Red-headed man possibly" , "Byname of William II" , "- Wainwright, US singer" , "Boy" .)