Crop in meadow originally changed (5)

I believe the answer is:

yield

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

I cannot understand how the remainder of the clue works.

(Other definitions for yield that I've seen before include "Render" , "Chicken out" , "Investment interest" , "Part with" , "Agree" .)

I've seen this clue in The Times.

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