The most common and most likely answer to this crossword clue is the 7 plus 7 letter word ELECTRA COMPLEX
I've seen this crossword clue in Financial Times
E
L
E
C
T
R
A
C
O
M
P
L
E
X
More clues leading to the result ELECTRA COMPLEX
Buddy explains!
The straight part
We know that "Loving father" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case loving father = electra complex.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.