Revolutionary soldier gets cable from president that's over the top? (7)

I believe the answer is:

periwig

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

'top?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for periwig that I've seen before include "Old rug" , "Locks" , "topping" , "Old kind of toupee" , "18th-century hairpiece" .)

I've seen this clue in The Irish 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.