Maybe describing line, done by Dorothy and Edward? (6)
I believe the answer is:
dotted
'maybe describing line' is the definition.
(as in a dotted line on a document)
'dorothy and edward?' is the wordplay.
'dorothy' becomes 'dot' (nickname for someone called Dorothy).
'and' says to put letters next to each other.
'edward?' becomes 'ted'.
'dot'+'ted'='DOTTED'
'done by' is the link.
(Other definitions for dotted that I've seen before include "Composed of small spots" , "in the form of ellipses" , "Covered with spots" , "Having a pattern of small round marks" , "...the Is and crossed the Ts" .)