Affected home education, including detailed command of language (10)
I believe the answer is:
influenced
'affected' is the definition.
(influencing is a kind of affecting)
'home education including detailed command of language' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'education' becomes 'ed' (abbreviation - e.g. sex ed).
'including' is an insertion indicator.
'detailed' means to remove the last letter (the tail of the word is removed).
'command of language' becomes 'fluency' (being fluent in language).
'in'+'ed'='ined'
'fluency' with its final letter taken off is 'fluenc'.
'ined' enclosing 'fluenc' is 'INFLUENCED'.
(Other definitions for influenced that I've seen before include "Had an effect on" , "Successfully applied pressure" .)