Superior-sounding female set (3)
I believe the answer is:
gel
I believe this is a double definition.
'superior-sounding female' is the first definition.
(informal term for an upper-class woman)
'set' is the second definition.
(I've seen this before)
(Other definitions for gel that I've seen before include "Congeal - hair dressing" , "stiffen" , "Hair treatment" , "Leg it back to get some for your hair" , "Sticky substance" .)