Front-row forward for certain bashed three-quarters? (6,8)

I believe the answer is:

proper fraction

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

'three-quarters?' is the definition.
I can't judge whether this defines the answer.

'front-row forward for certain bashed' is the wordplay.
'front row forward' becomes 'prop' (I've seen this before).
'bashed' indicates an anagram.
'for'+'certain'='forcertain'
'forcertain' with letters rearranged gives 'erfraction'.
'prop'+'erfraction'='PROPER FRACTION'

Can you help me to learn more?

I've seen this clue in The Telegraph.

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.