Funnily, he and his son found fame on TV (7)
I believe the answer is:
steptoe
'funnily he and his son found fame on tv' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for steptoe that I've seen before include "TV rag and bone man" , "TV rag-and-bone man" .)