Change occurs in plant (6)

I believe the answer is:

crocus

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'in plant' is the definition.
'crocus' can be an answer for 'plant' (I've seen this before). I'm not certain of the 'in' bit.

'change occurs' is the wordplay.
'change' indicates anagramming the letters.
'occurs' anagrammed gives 'CROCUS'.

Can you help me to learn more?

(Other definitions for crocus that I've seen before include "Bloomer" , "Spring-flowering plant" , "Flower from which saffron is harvested" , "Spring plant" , "Small plant with yellow, purple or white flowers" .)

I've seen this clue in The Telegraph.

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