Due to use, a point needs attention (4)
I believe the answer is:
wear
'due' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'a point needs attention' is the wordplay.
'a point' becomes 'w' (W is an example).
'needs' says to put letters next to each other.
'attention' becomes 'ear' (having someone's ear is having their attention).
'w'+'ear'='WEAR'
'to use' is the link.
Can you help me to learn more?
(Other definitions for wear that I've seen before include "Be clothed in" , "Have on; fray" , "Northern river - sport" , "Be dressed in" , "Have on - deteriorate from constant use" .)