Dresden novel about love signed on the back (8)
I believe the answer is:
Here is my best explanation:
'signed on the back' is the definition.
(I've seen this before)
'dresden novel about love' is the subsidiary indication.
'novel' indicates anagramming the letters.
'about' indicates putting letters inside.
'love' becomes 'o' (In tennis, 'love' means 'zero').
'dresden' with letters rearranged gives 'endrsed'.
'endrsed' going around 'o' is 'endorsed'.
(Other definitions for endorsed that I've seen before include "Certified or supported", "Formally backed", "Seconded", "Signed one's name to certify", "Given public approval", "Signed (cheque) on back", "Publicly approved", "Gave approval to", "Officially approved" and "Confirmed a statement or signed back of cheque".)