A little rainfall indicator? (6)

I believe the answer is:

shower

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

'a little rainfall' is the definition.
'shower' can be an answer for 'rainfall' (shower is a kind of rainfall). I am unsure of the 'a little' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for shower that I've seen before include "Person uncovering" , "Short fall of rain" , "Something depicting" , "Fall of rain; slack people (slang)" , "One who indicates way" .)

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.