Crossword Genius

Woody's friend used to be spinning tool (4,3)

Ross

I believe the answer is:

buzz saw

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

'woody's friend used' is the definition.
I can't tell whether this definition defines the answer.

'be spinning tool' is the wordplay.
'be' becomes 'buzz' (buzzing is a kind of being).
'spinning tool' becomes 'saw' (saw is a kind of tool. I am not sure about the 'spinning' bit.).
'buzz'+'saw'='BUZZ SAW'

'to' is the link.

Can you help me to learn more?

I've seen this clue in The Times.
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