Leaping over arched work in roof (8)

I believe the answer is:

vaulting

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

'leaping' is the definition.
(vaulting is a kind of leaping)

'over arched work in roof' is the wordplay.
'over' means one lot of letters go next to another.
'arched work in' becomes 'ing' (I am not sure about this - if you are sure you should believe this answer much more).
'roof' becomes 'vault' (vault is a kind of roof).
'ing' after 'vault' is 'VAULTING'.

Can you help me to learn more?

(Other definitions for vaulting that I've seen before include "Fan --; -- horse" , "Leap-frogging" , "Ornamental roof work" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.