She's covered a page in figures (6)
I believe the answer is:
shapes
'figures' is the definition.
(I know this)
'she's covered a page' is the wordplay.
'covered' is an insertion indicator.
'page' becomes 'p'.
'a'+'p'='ap'
'shes' enclosing 'ap' is 'SHAPES'.
'in' acts as a link.
(Other definitions for shapes that I've seen before include "Triangle, globe etc" , "Specific forms of things" , "Oblong and square, say" , "Moulds in phases" , "Oblong, square etc" .)