Piccard finally cracks two ways to secure source of hot air (7)

I believe the answer is:

windbag

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

But I can't explain it at all! Could you help me understand?

(Other definitions for windbag that I've seen before include "Bellows" , "A boaster or flatulent talker" , "Garrulous type" , "Boaster or balloon" , "One who speaks excessively" .)

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.