Group gets home drunk around one (9)
I believe the answer is:
eightsome
'group' is the definition.
(eightsome is a kind of group)
'gets home drunk around one' is the wordplay.
'drunk' is an anagram indicator.
'around' is an insertion indicator.
'one' becomes 'i' (Roman numeral).
'gets'+'home'='getshome'
'getshome' is an anagram of 'eghtsome'.
'eghtsome' enclosing 'i' is 'EIGHTSOME'.
(Other definitions for eightsome that I've seen before include "four groups of parents?" , "Group of four pairs" , "dance!" , "Reel" .)