Eat evening meal around six? Heavenly! (6)
I believe the answer is:
divine
'heavenly' is the definition.
(similar in meaning)
'eat evening meal around six?' is the wordplay.
'eat evening meal' becomes 'dine' (have dinner).
'around' is an insertion indicator.
'six?' becomes 'VI' (Roman numerals).
'dine' going around 'vi' is 'DIVINE'.
(Other definitions for divine that I've seen before include "Emanating from God" , "Sacred; delightful" , "'To err is human, to forgive . . . . . .'" , "Supreme" , "Godlike or extremely beautiful" .)