Leader browses regularly (4)
I believe the answer is:
boss
'leader' is the definition.
(boss is a kind of leader)
'browses regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternate letters of 'browses' are 'BOSS'.
(Other definitions for boss that I've seen before include "Stud; chief" , "Team manager" , "Leader - knob on shield" , "Domineer" , "One who manages" .)