Heavenly girl to dine out with (6)
I believe the answer is:
divine
'heavenly' is the definition.
(similar in meaning)
'girl to dine out with' is the wordplay.
'girl' becomes 'Di'.
'to dine out with' becomes 'vine' (I can't justify this - if you can you should believe this answer much more).
'di'+'vine'='DIVINE'
Can you help me to learn more?
(Other definitions for divine that I've seen before include "Holy" , "Heavenly" , "To do with deity" , "cleric is > delightful" , "Find water" .)