Eat around six? That's wonderful! (6)
I believe the answer is:
divine
'wonderful' is the definition.
(I've seen this before)
'eat around six?' is the wordplay.
'eat' becomes 'dine' (dining is a kind of eating).
'around' means one lot of letters goes inside another.
'six?' becomes 'vi' ('vi' can be a synonym of 'six').
'dine' placed around 'vi' is 'DIVINE'.
'that's' is the link.
(Other definitions for divine that I've seen before include "cleric is > delightful" , "Godlike (6" , "Very good" , "clergyman" , "Predict" .)