Skiing regularly leads to envy, possibly (3)
I believe the answer is:
sin
'envy possibly' is the definition.
(envy is a kind of sin)
'skiing regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'skiing' are 'SIN'.
'leads to' is the link.
(Other definitions for sin that I've seen before include "Trespass" , "Breach of morality" , "Pride, say" , "Immorality" , "Immoral action" .)