Dines out with song to provide some realism (10)
I believe the answer is:
disenchant
'provide some realism' is the definition.
'dines out with song' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'with' is a charade indicator (letters next to each other).
'song' becomes 'chant' (I've seen this before).
'dines' with letters rearranged gives 'disen'.
'disen'+'chant'='DISENCHANT'
'to' is the link.
(Other definitions for disenchant that I've seen before include "open someone's eyes" , "Make someone feel let down" , "take the magic away" .)