Reason to ditch pair of socks - a golfer's aim! (4,2,3)
I believe the answer is:
hole in one
'golfer's aim' is the definition.
The definition suggests a singular noun which matches the answer.
'reason to ditch pair of socks a' is the wordplay.
I cannot quite understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
'a' could be 'one' and 'one' is found within 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 hole in one that I've seen before include "Golfing feat" , "Singular score in golf" , "Singular achievement by golfer - literally" , "The best possible shot by a golfer" .)