Sort of posh retailer (4)
I believe the answer is:
shop
'sort of posh retailer' is the definition.
The answer and definition can be both to do with social activities as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
'sort of posh' is the wordplay.
'sort of' is an anagram indicator.
'posh' with letters rearranged gives 'SHOP'.
Can you help me to learn more?
(Other definitions for shop that I've seen before include "Be disloyal to" , "place of work" , "sales outlet" , "Retail establishment" , "Store, outlet" .)