Extreme at home with unruly teens (7)
I believe the answer is:
intense
'extreme' is the definition.
(similar in meaning)
'home with unruly teens' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'with' means one lot of letters go next to another.
'unruly' indicates anagramming the letters.
'teens' is an anagram of 'tense'.
'in'+'tense'='INTENSE'
'at' acts as a link.
(Other definitions for intense that I've seen before include "Deeply felt or vehement" , "Fervent" , "amplified?" , "Concentrated, deeply felt" , "Showing strong feelings or opinions" .)