Goodness (6)
'goodness' is the definition.
(I know that virtue is a type of goodness)
This is the entire clue.
(Other definitions for virtue that I've seen before include "Morally good quality" , "Admirable feature" , "Moral excellence" , "It's said to be its own reward" , "High-mindedness" .)
(Other definitions for thank that I've seen before include "Express gratitude" , "Be grateful to" , "Express appreciation to" , "Acknowledge" , "give credit" .)
'goodness' is the definition.
(both are expressions of surprise)
This is all the clue.
(Other definitions for gee that I've seen before include "American exclamation" , "that's something" , "Gracious" , "Alphabet's seventh letter" , "Expression of mild surprise (mainly US)" .)