Cryptic crossword clue
Record ratio turning up to queue for Southern’s trains

The most common and most likely answer to this crossword clue is the 11 letter word DISCIPLINES

I've seen this crossword clue in The Guardian
D
I
S
C
I
P
L
I
N
E
S

Buddy explains!

The straight part
We know that "trains" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case trains = disciplines.
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 DISCIPLINES mean?

DISCIPLINES noun
  1. A controlled behaviour; self-control.
  2. A specific branch of knowledge or learning.
DISCIPLINES verb
  1. To train someone by instruction and practice.
  2. To teach someone to obey authority.
  3. To punish someone in order to (re)gain control.
  4. To impose order on someone.

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