Cryptic crossword clue
Achieve something extra­ordinary in Spooner’s fishy puzzle? 4,7

The most common and most likely answer to this crossword clue is the 4 plus 7 letter word MAKE HISTORY

I've seen this crossword clue in The Guardian
M
A
K
E
H
I
S
T
O
R
Y

Buddy explains!

The straight part
We know that "Achieve something extra­ordinary" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case achieve something extra­ordinary = make history.
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.

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