A spinner highest placed? (4)

I believe the answer is:

atop

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

'highest placed?' is the definition.
I can't judge whether this defines the answer.

'a spinner' is the wordplay.
'spinner' becomes 'top' (a spinning top).
'a'+'top'='ATOP'

Can you help me to learn more?

(Other definitions for atop that I've seen before include "in the gods?" , "highest level" , "At the summit of" , "Cooker heating element" , "highly placed" .)

I've seen this clue in the Evening Standard.

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