Wreath with unusual name covering notice (6)
I believe the answer is:
anadem
'wreath' is the definition.
(I've seen this before)
'unusual name covering notice' is the wordplay.
'unusual' indicates an anagram.
'covering' means one lot of letters goes inside another.
'notice' becomes 'ad' (short for advert).
'name' is an anagram of 'anem'.
'anem' enclosing 'ad' is 'ANADEM'.
'with' is the link.
(Other definitions for anadem that I've seen before include "Wreath" , "Chaplet" , "Fillet" , "Garland for head of maenad" .)