Marriage followed by a hefty do, off a TV show (5,2,3,3)

I believe the answer is:

match of the day

I'm a little stuck... Click here to teach me more about this clue!

'a tv show' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'marriage followed by a hefty do off' is the wordplay.
'marriage' becomes 'match' (I've seen this before).
'followed by' means one lot of letters go next to another.
'off' indicates an anagram.
'a'+'hefty'+'do'='aheftydo'
'aheftydo' with letters rearranged gives 'oftheday'.
'match'+'oftheday'='MATCH OF THE DAY'

Can you help me to learn more?

(Other definitions for match of the day that I've seen before include "BBC TV programme with plenty of kicks?" , "Football programme" , "Football show" .)

I've seen this clue in The Times and The Sunday Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.