Anonymous text appended to edition of Donne (11)
I believe the answer is:
nondescript
'anonymous text appended to edition' is the definition.
I can't tell whether this defines the answer.
'donne' is the wordplay.
I cannot quite see how this works, but
an anagram of 'donne' is 'nonde' which is present in the answer.
The remaining letters 'script' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for nondescript that I've seen before include "Indistinguishable" , "uninspiring..." , "Without distinction" , "Plain, uninteresting" , "undistinguished" .)