Cryptic crossword clue
One entering classic I see, striking a chord? 7

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

I've seen this crossword clue in The Guardian
T
R
I
A
D
I
C

Buddy explains!

The straight part
We know that "striking a chord?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case striking a chord? = triadic.
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 TRIADIC mean?

TRIADIC adjective
  1. Of or relating to a triad
  2. Trivalent
  3. Describing interpreting that involves three parties, i.e., the two clients and the interpreter

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