Engage in sport and kit wears out (8)
I believe the answer is:
waterski
'engage in sport' is the definition.
(I've seen this before)
'kit wears out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'kit'+'wears'='kitwears'
'kitwears' is an anagram of 'WATERSKI'.
'and' is the link.
(Other definitions for waterski that I've seen before include "Take part in a sport" , "Engage in sport" .)