Upbringing having run true to form? (7)
I believe the answer is:
nurture
'upbringing' is the definition.
(nurture is a kind of upbringing)
'run true to form?' is the wordplay.
'to form?' indicates anagramming the letters (I've seen 'formed' mean this).
'run'+'true'='runtrue'
'runtrue' is an anagram of 'NURTURE'.
'having' is the link.
(Other definitions for nurture that I've seen before include "Train" , "Care for during upbringing" , "Training" , "Foster, feed" , "Cherish (an ambition)" .)