Cryptic crossword clue
Main channel's receiver concealing coating of rust 8

The most common and most likely answer to this crossword clue is the 8 letter word ARTERIAL

I've seen this crossword clue in The Times
A
R
T
E
R
I
A
L


Buddy explains!

The straight part
We know that "Main channel's" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case main channel's = arterial.
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 ARTERIAL mean?

ARTERIAL noun
  1. A through road.
ARTERIAL adjective
  1. Of or relating to an artery.
  2. (of a route, road or street) Major, important.

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