How you said "I've reached the top of the ladder"? (7)

I believe the answer is:

loftily

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

'how' is the definition.
Both the answer and definition are adverbs. Perhaps there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for loftily that I've seen before include "In an arrogant manner" , "In high style" .)

I've seen this clue in the Evening Standard.

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