Friendly, like this one in television (8)
I believe the answer is:
sociable
'friendly' is the definition.
(associated in meaning)
'like this one in television' is the wordplay.
'like this' becomes 'so' ('like so').
'one' becomes 'I' (Roman numeral).
'in' indicates putting letters inside.
'television' becomes 'cable television' (cable is a kind of television).
'i' inserted within 'cable' is 'ciable'.
'so'+'ciable'='SOCIABLE'
(Other definitions for sociable that I've seen before include "Friendly - gregarious" , "Easy in company" , "Fond of others' company" , "Companionable, friendly" , "Marked by friendliness" .)