Dame rants about retailer (9)
I believe the answer is:
tradesman
'retailer' is the definition.
(I've seen this before)
'dame rants about' is the wordplay.
'about' indicates anagramming the letters.
'dame'+'rants'='damerants'
'damerants' is an anagram of 'TRADESMAN'.
(Other definitions for tradesman that I've seen before include "A skilled worker like plasterer or joiner" , "Buyer/seller of goods" , "Retailer - artisan" , "Skilled worker; shopkeeper" , "Small businessman" .)