Could Dick be a producer of plant disease? (7)

I believe the answer is:

dieback

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

'plant disease?' is the definition.
(I know that dieback is a type of plant disease)

'could dick be a producer' is the wordplay.
'dick be a' anagrams to 'DIEBACK'.
But, I am unsure how the anagram is indicated.

'of' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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