Wonderful publication niece oddly ignored (5)
I believe the answer is:
magic
'wonderful' is the definition.
(I've seen this before)
'publication niece oddly ignored' is the wordplay.
'publication' becomes 'mag' (abbreviation for magazine).
'oddly ignored' means one should take alternating letters (letters in odd-numbered positions are removed).
The alternate letters of 'niece' are 'ic'.
'mag'+'ic'='MAGIC'
(Other definitions for magic that I've seen before include "Sorcery - conjuring" , "Witchcraft" , "Supernatural power" , "Wonderful" , "Great" .)