Father's pitch to Ten Top singer (3,4)
I believe the answer is:
pop star
'ten top singer' is the definition.
'pop star' can be an answer for 'singer' (I have seen 'Popular singer ' mean 'pop star' so perhaps 'singer' could also mean 'pop star'). I am not certain of the 'ten top' bit.
'father's pitch' is the wordplay.
'father's' becomes 'pop's' (pop is a kind of father).
'pitch' becomes 'tar' (synonyms).
'pops'+'tar'='POP-STAR'
'to' is the link.
Can you help me to learn more?
(Other definitions for pop star that I've seen before include "Popular singer" , "Chart musician" , "Musical celebrity" .)