Describing Everyman: 'regularly woolly, glib' (4)
I believe the answer is:
oily
'glib' is the definition.
(thesaurus)
'describing everyman regularly woolly' is the wordplay.
'describing' is an insertion indicator (describe can mean to form the outline of).
'everyman' becomes 'i' (where 'Everyman' is the setter of the crossword).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'woolly' are 'oly'.
'i' put inside 'oly' is 'OILY'.
(Other definitions for oily that I've seen before include "Smoothly ingratiating" , "covered in grease" , "Unpleasantly ingratiating" , "Smooth; like lubricant" , "Unctuous" .)