Crossword Genius

Doctor right person possibly seen about infestation (3,3)

Ross

I believe the answer is:

dry rot

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

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for dry rot that I've seen before include "Degeneration" , "Fungus causing timber decay" , "Usual, customary" , "Fungus attacking wood" , "problem with deal?" .)

I've seen this clue in The Independent.
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