Fancy doorbell, but not a respectable place (8)
I believe the answer is:
bordello
'not a respectable place' is the definition.
(term for a brothel)
'fancy doorbell' is the wordplay.
'fancy' indicates anagramming the letters.
'doorbell' with letters rearranged gives 'BORDELLO'.
'but' is the link.
(Other definitions for bordello that I've seen before include "Where one pays for the other" , "12 across (anag)" , "Disorderly house" , "Congress here" , "Madam's house" .)