Gorge at home during party (6)
I believe the answer is:
ravine
'gorge' is the definition.
(thesaurus)
'home during party' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'during' is an insertion indicator.
'party' becomes 'rave' (I've seen this before).
'in' placed into 'rave' is 'RAVINE'.
'at' is the link.
(Other definitions for ravine that I've seen before include "'Deep, steep valley (6)'" , "Narrow, steep-sided valley" , "Deep narrow gorge between mountains" , "Steep-sided gorge" , "Canyon" .)