Couple one over par? Just the opposite (4)
I believe the answer is:
pair
'couple' is the definition.
(synonyms)
'one over par? just the opposite' is the wordplay.
I cannot really understand how this works, but
'one' could be 'i' (Roman numeral) and 'i' is present in the answer.
'par?' could be 'par' and 'par' is found within the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pair that I've seen before include "Two of a similar type" , "item" , "flight of stairs" , "Set of two" , "Duo" .)