In favour, not only with father (7)
I believe the answer is:
popular
'in favour' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for popular that I've seen before include "Widely admired" , "Non-technical" , "Democratic - of general appeal" , "The people's" , "Commonly known" .)