Sultan's group (5)
I believe the answer is:
harem
'sultan's group' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for harem that I've seen before include "Women's place" , "Place for women" , "Quarters for women in Muslim household, a seraglio" , "A lot of females" , "Group of wives" .)