Crossword Genius

First two good sports eliminate religious truths (6)

Ross

I believe the answer is:

gospel

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

'first' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's a link between them I don't understand?

'two good sports eliminate religious truths' is the wordplay.
I cannot really understand how this works, but
'good' could be 'g' (abbreviation) and 'g' is found in the answer.
'sports' could be 'pe' (Physical Education) and 'pe' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for gospel that I've seen before include "The teaching of Christ" , "Type of music" , "God's honest truth" , "church music" , "Black evangelical singing" .)

I've seen this clue in the Sydney Morning Herald.
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