Nasty look is enough to make you stagger back (4)

I believe the answer is:

reel

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

'stagger back' is the definition.
'reel' can be an answer for 'stagger' (both can mean to move around without balance). I'm unsure of the 'back' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for reel that I've seen before include "Dance; winding drum" , "Winding spool on a fishing rod" , "Highland dance" , "A merry dance or an angler's winder" , "Turn around in the dance" .)

I've seen this clue in The Globe and Mail.

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.