Refined tongue perhaps? (2,4,5)

I believe the answer is:

in good taste

I'm a little stuck... Click here to teach me more about this clue!

'refined' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for in good taste that I've seen before include "Satisfying generally accepted social or aesthetic standards" , "not likely to offend" .)

I've seen this clue in The Irish News.

Want a hint initially instead of a full solution? Install my app