Crossword Genius

It measures nothing less than a shooting star! (5)

Ross

I believe the answer is:

meter

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

'it measures' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for meter that I've seen before include "Device for measuring and recording" , "Something measuring" , "Measuring device as for electricity usage (5)" , "Device that measures, say, electricity usage" , "Device for recording, say, usage (5)" .)

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