Home entry fixed to include everybody on the inside (10)
I believe the answer is:
internally
'on the inside' is the definition.
('internally' can be a synonym of 'on the inside')
'home entry fixed to include everybody' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'fixed' indicates anagramming the letters.
'to include' means one lot of letters goes inside another.
'everybody' becomes 'all' (I've seen this before).
'entry' is an anagram of 'terny'.
'terny' going around 'all' is 'ternally'.
'in'+'ternally'='INTERNALLY'
(Another definition for internally that I've seen is " within".)