Entrenched at home, reading review (9)
I believe the answer is:
ingrained
'entrenched' is the definition.
(thesaurus)
'home reading review' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'review' is an anagram indicator.
'reading' anagrammed gives 'grained'.
'in'+'grained'='INGRAINED'
'at' is the link.
(Other definitions for ingrained that I've seen before include "Dine in rag (anag.)" , "Deep-rooted" , "Deep-dyed" .)