Everybody warned to ignore odds during sporting tie (3,3,3)
I believe the answer is:
one and all
'everybody' is the definition.
(one and all can mean all people)
'warned to ignore odds during sporting tie' is the wordplay.
'to ignore odds' means one should take alternating letters (letters in odd-numbered positions removed).
'during' means one lot of letters goes inside another.
'sporting tie' becomes 'one-all' (score of 1-1).
The alternating letters of 'warned' are 'and'.
'and' put into 'oneall' is 'ONE AND ALL'.
(Other definitions for one and all that I've seen before include "Everyman" , "Everybody without exception" , "Absolutely everybody" .)