Yield first place? It may be quite revealing (4,3)

I believe the answer is:

crop top

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'place? it may be quite revealing' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'yield first' is the wordplay.
'yield' becomes 'crop' (yield can mean a crop or harvest).
'first' becomes 'top' (top can mean the best or first).
'crop'+'top'='CROP TOP'

Can you help me to learn more?

I've seen this clue in The Irish Times.

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