Cryptic crossword clue
Rotten, stained clothing repelled expert 7

The most common and most likely answer to this crossword clue is the 7 letter word DECAYED

D
E
C
A
Y
E
D

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The straight part
We know that "Rotten" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rotten = decayed.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does DECAYED mean?

DECAYED verb
  1. To deteriorate, to get worse, to lose strength or health, to decline in quality.
  2. (of organic material) To rot, to go bad.
  3. (of an unstable atom) To change by undergoing fission, by emitting radiation, or by capturing or losing one or more electrons.
  4. (of a quantum system) To undergo optical decay, that is, to relax to a less excited state, usually by emitting a photon or phonon.
  5. Loss of airspeed due to drag.
  6. To cause to rot or deteriorate.
DECAYED adjective
  1. Having undergone decay, rotted.
  2. Reduced in circumstances; having lost one's status or fortune.

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