Cryptic crossword clue
The sort of grouping that’s not expensive, with duty to replace European Commission 9

The most common and most likely answer to this crossword clue is the 9 letter word TAXONOMIC

I've seen this crossword clue in The Daily Telegraph
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Buddy explains!

The straight part
We know that "sort of grouping" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sort of grouping = taxonomic.
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 TAXONOMIC mean?

TAXONOMIC adjective
  1. Of, or relating to taxonomy.

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