Dorothy and Edward get sentence and somewhere to sign (6,4)
I believe the answer is:
dotted line
'somewhere to sign' is the definition.
I can't tell whether this definition defines the answer.
'dorothy and edward get sentence' is the wordplay.
'dorothy' becomes 'dot' (short for Dorothy).
'and' means one lot of letters go next to another.
'edward' becomes 'ted'.
'get sentence' becomes 'line' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'dot'+'ted'+'line'='DOTTED LINE'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for dotted line that I've seen before include "Site for signature" , "sign on here" .)