Queen's after extravagant fur producers? (6)
I believe the answer is:
otters
'fur producers?' is the definition.
'queen's after extravagant' is the wordplay.
'queen's' becomes 'ers' (abbreviation for Elizabeth Regina).
'after' is a charade indicator (letters next to each other).
'extravagant' becomes 'ott' (I've seen this in other clues).
'ers' put after 'ott' is 'OTTERS'.
(Other definitions for otters that I've seen before include "web-footed creatures" , "Mammals with webbed feet" , "Sleek water-animals" , "Sleek short-furred swimmers" , "Fish-eating water animals, put to rest" .)