Cryptic crossword clue
Referee’s parting shots for sub, for example 6

The most common and most likely answer to this crossword clue is the 6 letter word PREFIX

I've seen this crossword clue in Financial Times
P
R
E
F
I
X


Buddy explains!

The straight part
We know that "sub, for example" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sub, for example = prefix.
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 PREFIX mean?

PREFIX noun
  1. Something placed before another
PREFIX verb
  1. To determine beforehand; to set in advance.
  2. To put or fix before, or at the beginning of something; to place at the start.

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