Only the odd contrary characters suss out pitch (4)
I believe the answer is:
toss
'pitch' is the definition.
('toss' can be a synonym of 'pitch')
I don't understand the rest of the clue.
(Other definitions for toss that I've seen before include "'Flip, a coin or pancake say (4)'" , "Heads or tails throw" , "What to do with a pancake and a caber" , "when ship does this?" , "Leave decision to chance" .)