Crossword Genius

A cat is a tiny little thing (4)

Ross

I believe the answer is:

atom

'a tiny little thing' is the definition.
(tiny particle)

'a cat' is the wordplay.
'cat' becomes 'tom' (a tom is a male cat).
'a'+'tom'='ATOM'

'is' acts as a link.

(Other definitions for atom that I've seen before include "Basic unit of a chemical element" , "It was once thought to be smallest particle of matter" , "Very small object or amount" , "Particle of matter now divided" , "A tiny powerful particle" .)

I've seen this clue in The Guardian.
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.