Spellbound? That’s right and appropriate (4)
I believe the answer is:
rapt
'spellbound?' is the definition.
(thesaurus)
'right and appropriate' is the wordplay.
'right' becomes 'r' (common abbreviation).
'and' is a charade indicator (letters next to each other).
'appropriate' becomes 'apt' ('apt' can be a synonym of 'appropriate').
'r'+'apt'='RAPT'
'that's' acts as a link.
(Other definitions for rapt that I've seen before include "Part of being intent and absorbed" , "Ecstatic in part" , "Enraptured, entranced" , "carried away" , "Spellbound in part" .)