Left half or right half in team, with predictable result (3-5)
I believe the answer is:
one-horse
'left' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'half or right half in team with predictable result' is the wordplay.
I cannot really see how this works, but
'half' could be 'one' (I have seen 'Half of two ' mean 'one' so perhaps 'half' could also mean 'one') and 'one' is found within the answer.
'or' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for one-horse that I've seen before include "(Of a town) having few facilities" , "With only a single equine, the town is very small" , "Small town, with only one quadruped?" , "Small, remote and insignificant (place)" , "Small, like a buggy?" .)