Dean oddly ignored song's charm (7)
I believe the answer is:
enchant
'charm' is the definition.
(enchanting is a kind of charming)
'dean oddly ignored song's' is the wordplay.
'oddly ignored' indicates alternate letters.
'song' becomes 'chant' (I've seen this before**).
The alternate letters of 'dean' are 'en'.
'en'+'chant'='ENCHANT'
(Other definitions for enchant that I've seen before include "Delight, charm" , "transport" , "Delight or bewitch" , "Captivate, charm" , "Bewitch, charm" .)