Cryptic crossword clue
Boxer, for instance, showing goodness repeatedly

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

I've seen this crossword clue in Independent
G
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Buddy explains!

The straight part
We know that "Boxer, for instance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case boxer, for instance = gee-gee.
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 GEE-GEE mean?

GEE-GEE noun
  1. (usually childish) A horse.

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