Struggle with voice regularly (3)
I believe the answer is:
vie
'struggle' is the definition.
(to vie is to struggle or contend with)
'voice regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
The alternating letters of 'voice' are 'VIE'.
'with' is the link.
(Other definitions for vie that I've seen before include "Eagerly compete" , "Try to do better than" , "Contend for superiority" , "Compete (with others)" , "Rival" .)