The most common and most likely answer to this crossword clue is the 7 letter word MAGPIES
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Buddy explains!

The straight part
We know that "22 having ‘18,4’/22 having ‘18,4’" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 22 having ‘18,4’/22 having ‘18,4’ = magpies.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 MAGPIES mean?
MAGPIES noun- One of several kinds of bird in the family Corvidae
- A superficially similar Australian bird, Gymnorhina tibicen or Cracticus tibicen.
- Someone who displays a magpie-like quality such as hoarding or stealing objects.
- A fan or member of Newcastle United F.C.
- The 3rd circle on a target, between the inner and outer.
- A halfpenny.
- To mark with patches of black and white or light and dark.
- To steal or hoard (items) as magpies are believed to do.
- To talk idly; to talk about other people's private business.