Crazed guy grabs student: not a pretty sight (4)

I believe the answer is:

ugly

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

'not a pretty sight' is the definition.
I can't judge whether this definition defines the answer.

'crazed guy grabs student' is the wordplay.
'crazed' indicates an anagram (a crazy order of the letters).
'grabs' means one lot of letters goes inside another.
'student' becomes 'L' (as in L-plates for learner drivers).
'guy' with letters rearranged gives 'ugy'.
'ugy' going around 'l' is 'UGLY'.

Can you help me to learn more?

(Other definitions for ugly that I've seen before include "describe duckling thus" , "Visually unpleasant; dangerous (situation)" , "Like an eyesore" , "Nasty to look at" , "Evil-looking" .)

I've seen this clue in The Sun.

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.