Group of mates round after lager is drunk (8)
I believe the answer is:
seraglio
'group of mates' is the definition.
'seraglio' can be an answer for 'group' (I have seen 'Group of women' mean 'seraglio' so perhaps 'group' could also mean 'seraglio'). I am not certain of the 'of mates' bit.
'round after lager is drunk' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'after' says to put letters next to each other.
'drunk' is an anagram indicator.
'lager'+'is'='lageris'
'lageris' with letters rearranged gives 'seragli'.
'o' put after 'seragli' is 'SERAGLIO'.
Can you help me to learn more?
(Other definitions for seraglio that I've seen before include "Gaolers I found in Turkish women's quarters" , "Turkish sultan's palace - gear oils (anag)" , "female quarters" , "wives and concubines" , "Gaolers I mixed up in harem" .)