Crazy about spots (5)

I believe the answer is:

dotty

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

'crazy about' is the definition.
('dotty' can be a synonym of 'crazy about')

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for dotty that I've seen before include "Bonkers; speckled" , "Slightly crazy" , "Silly; crazy" , "Barking" , "Eccentric, slightly mad" .)

I've seen this clue in The Mirror.

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.