Has an attritional effect on pointed ears (5)
I believe the answer is:
wears
'has an attritional effect' is the definition.
'wears' can be an answer for 'has' (wearing is a kind of having). I'm unsure of the 'an attritional effect' bit.
'pointed ears' is the wordplay.
'pointed' becomes 'w' (I am not sure about this - if you are sure you should believe this answer much more).
'w'+'ears'='WEARS'
'on' acts as a link.
Can you help me to learn more?
(Other definitions for wears that I've seen before include "Swear (anag.)" , "Sports; erodes" , "Dresses in" , "Dons (clothes)" .)