Crossword Genius

How the unwelcoming Jack spoke? (8)

Ross

I believe the answer is:

frostily

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

'how' is the definition.
Both the definition and answer are adverbs. Maybe you can see an association between them that I don't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for frostily that I've seen before include "How Jack may behave" , "in an aloof manner?" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app